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| Registros recuperados: 28 | |
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| Backer, C.A.. |
| Aquatic often rather large perennial herbs with creeping, subterranean stolons. Stem simple or branched, leafy at the base, stiff or flaccid, erect or floating, bearing a terminal spike or panicle. Leaves long, linear from a sheathing base. Flowers (♂♀), crowded in separate globose clusters; lower clusters ♀, in or above the axil of a leafy bract, stalked or sessile; higher clusters ♂, bractless or with a small bract. ♂: Perianth actinomorphic, choriphyllous. Tepals 3(-6), spathulate. Stamens 3(-6); filaments free or connate at the base; anthers basifixed, oblong; pollen globose. ♀: Tepals as in ♂ but larger. Ovary 1, exceptionally 2, sessile with a narrow base, unilocular; ovule 1, pendulous; style 1, usually simple, rarely forked; stigma unilateral,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532622 |
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| Backer, C.A.. |
| Small trees or erect shrubs. Leaves spirally arranged, simple, petioled, entire, palmatinerved, densely red-dotted. Stipules small, very caducous. Flowers in terminal corymbs or panicles, actinomorphic, ♀, rather large. Pedicel with 5-6 apical glands. Sepals 4-5, free, imbricate in bud, falling off as soon as the flower expands. Petals 4-7, free, imbricate in bud. Stamens numerous, inserted on an annular hypogynous disk; filaments thin, free; anthers horseshoe-shaped, passing over the top of the filament and with both ends closely applied to i , 2-celled; cells opening in the middle (on the top of the filament) by short slits which unite into a spuriously apical pore. Ovary superior, usually bristly, 1-celled, with 2 opposite parietal slightly intruding... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532663 |
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| Backer, C.A.. |
| Erect or ascending herbs, annual or perennial, sometimes woody at the base. Leaves alternate, stipulate or not, simple, petioled, serrate or serrate-dentate, biglandular at the base or not, herbaceous. Flowers in the Malaysian species solitary in the leafaxils or in terminal racemes, actinomorphic, ♀, homostylous or heterodistylous, ephemerous. Calyx gamophyllous, 5-fid, after anthesis circumsciss at the base; segments imbricate in bud. Petals 5, inserted in the throat of the calyx-tube, contorted in bud, free, shortly clawed or subsessile, deciduous after anthesis. Stamens 5, inserted on calyx-tube, alternating with the petals; filaments filiform-subulate, free; anthers introrse, 2-celled; cells opening longitudinally. Ovary superior, sessile, 1-celled;... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532572 |
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| Backer, C.A.. |
| Herbs, shrubs or (not in Malaysia) trees. Leaves alternate, simple, entire; stipules minute or absent. Flowers in terminal, axillary or lateral racemes, bracteate and bibracteolate, ♀ or unisexual, actinomorphic or zygomorphic, mostly (so in the Malaysian species) monochlamydeous. Tepals 4-5, herbaceous or membranaceous, free, imbricate in bud, coloured during and often also after anthesis, equal or unequal, persistent. Stamens 3 to many, usually inserted on a hypogynous disk, either regularly or irregularly arranged, 1—2-seriate; those of the only or outer series more or less alternating with the tepals; filaments slender, free, persistent; anthers dorsi- or basifixed, dehiscing longitudinally. Ovary superior, composed of 1 or more carpels; these either... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532576 |
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| Backer, C.A.. |
| Herbs, rarely climbing or clambering shrubs. Leaves opposite or alternate, exstipulate, simple, entire or obsoletely dentate-serrate. Flowers ♀, unisexual, or partly difformed and neutral, in clusters, heads, racemes, spikes or panicles, solitary or clustered in the axil of persistent bracts, usually bibracteolate. Tepals 3-5, mostly free; bracts, bracteoles and tepals with scarious margins or entirely scarious; bracteoles falling off with the perianth or persistent; perianth usually enclosing the fruit and falling off with it, rarely persistent. Stamens as many as petals and opposed to them, rarely fewer; filaments free, or connate below, or almost entirely united in a cup or tube, with or without interposed dentiform, subulate, linear or short and broad... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532537 |
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| Backer, C.A.. |
| Annual or perennial herbs or shrubs, often fleshy, glabrous, papillate or hairy. Leaves opposite or alternate, exstipulate, sometimes seemingly wanting, stalked or sessile, entire, dentate-serrate-lobed or irregularly gashed. Flowers solitary, 2—3-nate or glomerate, usually sessile, either axillary or in terminal or axillary dense or interrupted spikes or panicles, ♀ or unisexual, monochlamydous, rarely achlamydous, small; bracts present or absent, usually small, rarely leafy. Perianth herbaceous or sometimes scarious, rarely (in ♀) absent, 3—5-partite with (in bud) imbricate segments, or sometimes almost entirely gamophyllous and then shortly lacerate-dentate or unilaterally cleft, persistent, after anthesis accrescent or not. Stamens often the same... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532643 |
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| Backer, C.A.. |
| Perennial herbs, with a short, often strong-smelling rootstock. Lowest leaves in a basal rosette, higher ones decussate, simple, odd-pinnate or deeply pinnatifid, exstipulate but those of one pair often connected by a raised line, radical ones often long-petioled. Flowers small, ♀ or unisexual, bracteate, sessile, cymose; cymes united into an often large, terminal panicle or corymb. Bracts small, opposite, persistent, oblong or linear, on the ultimate branchlets of the inflorescence only one bract of each pair flowerbearing. Calyx small, persistent; limb during anthesis short, inrolled, deeply divided into 10 or more segments, these in fruit unrolling, much accrescent, finally widely patent, plumose, pappuslike. Corolla gamopetalous, caducous after... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532522 |
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| Backer, C.A.. |
| In a previous number of this volume (Blumea V, nr. 1, 1942, p. 66—80), one of the junior writers of the present paper published an account of nomenclatorial changes concerning javanese Verbenaceae. This paper was written as a supplement to a larger work by the senior writer, who has for long years devoted most of his activities to the study of the flora of Java, on which it was his privilege to publish some more or less extensive papers, all of them in the Dutch language 2). These publications may be considered materials for a Flora of Java. In fact, some of them have the character and even the title of such a flora, though on account of several circumstances none of them could be completed. Since the senior writer had retired from his official duties, an... |
| Tipo: Article / Letter to the editor |
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| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/524581 |
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| Backer, C.A.; Steenis, C.G.G.J. van. |
| Trees. Leaves opposite, biseriate, exstipulate, simple, entire, coriaceous. Flowers ♀, either 1-3 together at the summits of the branchlets or in terminal corymbs, pedicelled, rather large, actinomorphic. Calyx thickly coriaceous, persistent, gamosepalous; segments 4-8, valvate in bud, acute, often coloured inside; tube of fruiting calyx flat or not. Petals either absent or as many as calyx-segments; in the latter case either broad and wrinkled or very narrow and smooth, alternating with the sepals. Stamens mostly many, sometimes 12, inserted on the calyx, often manyseriate, inflexed in bud; filaments filiform-subulate; anthers medifixed, reniform or oblong, 2-celled; cells opening lengthwise. Ovary superior, sessile with a broad base, during anthesis... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532551 |
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| Backer, C.A.. |
| Annual or perennial herbs or undershrubs, sometimes fleshy. Leaves simple, entire or subentire, opposite, spread, or spuriously whorled, sometimes minute, stipulate or not. Stipules often small, scarious, fugacious. Flowers axillary, solitary, clustered or fascicled, cymose, pseudoracemose, or subumbellate, actinomorphic, usually ♀, often small and inconspicuous. Tepals 5, either free, imbricate in bud, herbaceous with scarious often white margins or entirely scarious, persistent, conniving before and after anthesis, or a distinctly gamophyllous, corolline or calycine 3—8-lobed perianth with usually persistent, herbaceous lobes imbricate or rarely valvate in bud. Stamens 1-~, perigynous or hypogynous, free or connate at the base, either singly or in... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532550 |
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| Backer, C.A.. |
| Shrubs or small trees, usually spiny. Leaves opposite, alternate or fascicled, exstipulate, simple, entire, penninerved, small. Flowers terminal and subterminal, sessile or nearly so, rather large, ♀, actinomorphic. Calyx thickly coriaceous, coloured, gamophyllous; tube campanulate-urceolate, adnate to the ovary and produced above it, inside with an annular thickening; segments 5-9, valvate in bud, ovate-triangular, acute, persistent. Petals the same number as calyx-lobes and alternating with them, imbricate and strongly crumpled in bud, obovate, deciduous. Stamens very numerous, inserted on the annular thickening of the calyx, deciduous; filaments incurved in bud, filiform, free; anthers dorsifixed, 2-celled; cells bursting longitudinally. Ovary entirely... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532505 |
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| Backer, C.A.. |
| Delicate, annual or perennial herbs, aquatic and then either entirely submersed, or floating in the upper part, or, in humid localities, not rarely terrestrial and creeping, with slender stems. Leaves opposite, at the summits of floating stems often spuriously rosulate, exstipulate, small, linear, elliptic, oblong or spathulate, entire, herbaceous, in the Mal. sp. triplenerved. Flowers minute, unisexual, axillary, solitary or rarely one ♂ and one ♀ flower from the same axil, often with 2 caducous, transversal, opposite, tender concave bracts. Calyx and corolla absent, ♂: Stamen 1; filament thin, anther 2-celled, cells bursting lengthwise, the slits becoming confluent at the top. ♀: Ovary sessile or subsessile, 4-lobed, 4-celled. Ovule solitary in each... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532642 |
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| Backer, C.A.. |
| Annual herbs. Leaves stipulate, opposite or verticillate, simple. Flowers axillary, solitary, glomerate or fascicled, actinomorphic, ♀, small or minute; sepals 2-5, free or shortly connate, imbricate in bud, pellucid or with pellucid margins, 1-nerved or nerveless, persistent. Petals the same number as sepals, not or slightly surpassing them, imbricate in bud, free, membranous, persistent. Disk absent. Stamens as many as petals (and alternating with them) or more, but not more than twice their number, persistent; anthers dorsifixed, small, 2-celled; cells bursting longitudinally. Ovary superior, 2—5-celled, isomerous (except in Bergia trimera); cells ~-ovuled. Ovules in the inner angles of the cells. Styles equal in number to the cells, free, short,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532664 |
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| Backer, C.A.. |
| Much-branched, erect or rambling shrubs, armed with axillary spines. Leaves opposite, often with rudimentary stipules, simple, quite entire. Flowers in axillary or terminal racemes or panicles, or in axillary fascicles, unisexual (monoecious or dioecious) or sometimes partly bisexual, actinomorphic, 4-merous. Calyx campanulate, 4-lobed or 2—4-partite. Petals 4, free, imbricate in bud, oblong or lanceolate. Disk absent. ♂: Stamens 4, alternating with the petals, longer than the corolla, in ♀ reduced to staminodes; filaments slender, free or connate at the base; anthers oval, cells 2, back to back, opening longitudinally; no rudimentary ovary. ♀: Staminodes 4, not exceeding the corolla, anthers barren. Ovary superior, globose, 2-celled or imperfectly... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532625 |
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| Backer, C.A.. |
| According to general opinion the spikelets of Oryza consist, reckoned from their base upwards, of 2 sterile glumes, called hereafter I and II, one fertile glume (valvula inferior; lemma), called hereafter III, and the palea valvula superior) to this glume, called hereafter p3. The spikelets are placed singly on the very short ultimate branchlets, called hereafter pedicels, of a more or less strongly ramose panicle; the tips of the pedicels are broadened into a shallow infra-spicular cup, either distinctly 2-lobed or not; from the bottom of the cup arises a minute knob, on which the very distinct basal callus of the spikelet is jointed. When ripe, the spikelets of the wild species fall off as a whole, disarticulating at the joint (in dried specimens often... |
| Tipo: Article / Letter to the editor |
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| Ano: 1946 |
URL: http://www.repository.naturalis.nl/record/526340 |
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| Backer, C.A.. |
| Erect tall annual, usually branched. Leaves simple, with 2 free stipules, in the lower part of the stem opposite, in the higher part spirally arranged, long-petioled, palmate, 3—11-foliolate. Flowers (♂) (♀) or mostly (♂♀). Male flowers in short, dense cymes, which are united into lax, foliate, terminal panicles, very shortly pedicelled. Tepals 5, free, oblong, membranous, imbricate. Stamens 5, epitepalous; filaments erect and short in bud, linear, with a narrowed apex; anthers comparatively large, basifixed, 2-celled, cells opening longitudinally, rudimentary ovary absent. Female flowers solitary in the axil of a small, primary, membranous, entire bract closely enveloping the ovary, each enveloped by a spathaceous, conspicuous, acuminate, secondary bract.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532671 |
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| Backer, C.A.. |
| Herbs or undershrubs, usually succulent, perennial, less often annual or biennial. Leaves spirally arranged, opposite or whorled, exstipulate, simple or compound, entire, dentate, crenate, serrate or deeply incised. Flowers ♀, rarely unisexual, actinomorphic, usually cymose or cymose-paniculate, rarely spicate or solitary in leaf-axils, pedicelled or sessile, mostly 4—5-, rarely 3- or polymerous. Sepals free or nearly so, or united into a distinct tube, after anthesis marcescent and persistent as are the petals. Petals the same number as sepals, rarely more, hypogynous, free or variously connate. Stamens either as many as petals and alternate with them or twice their number, perigynous or all or partly inserted on the corolla; filaments free from each... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532573 |
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| Backer, C.A.. |
| Perennial, palustrial or aquatic herbs with a creeping rhizome; stems erect, solid, submerged at the base. Leaves biseriate, partly radical or subradical, partly cauline, lower congested, higher remote, elongate-linear, rather thick and spongy, bluntmargined; their sheathing bases excreting slime on their inner side. Flowers very numerous, very closely packed in 2 or less often 3, superposed, contiguous or more or less remote terete unisexual spikes; upper spike male; the 1-2 lower ♀; all spikes at the base with a foliaceous bract which falls off long before anthesis; the ♀ spikes here and there between the flowers often with a similar bract. ♂ Flowers consisting of 3 flat hairs together surrounding 2-5 stamens; anthers basifixed, linear, 2-celled;... |
| Tipo: Article / Letter to the editor |
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| Ano: 1948 |
URL: http://www.repository.naturalis.nl/record/532543 |
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| Backer, C.A.. |
| As far as known at present there occur in Java 4 wild species of Gynura, viz. G. aurantiaca (B1.) DC., G. carnosula Z.M., G. densiflora Miq. and G. procumbens (Lour.) Merr. A fifth species. G. pseudochina (L.) DC., is met with as a cultivated plant only, and even as such it seems to be very rare. A sixth. G. crepidioides Bth., an African plant of recent introduction, is better placed in Crassocephalum. Only one of the wild species, G. procumbens, occurs throughout the island, from sea-level up to about 2100 m. altitude. G. aurantiaca is restricted to West- and Central-Java, where it is found between 750 and 2400 m. alt.; along watercourses, however, it occasionally descends¹ as low as 350 m.; its area of distribution, extending from Mount Gědè to Mount... |
| Tipo: Article / Letter to the editor |
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| Ano: 1939 |
URL: http://www.repository.naturalis.nl/record/534891 |
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| Registros recuperados: 28 | |
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