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| Registros recuperados: 31 | |
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| Henrard, J.Th.. |
| Piptochaetium was described in the year 1830 by Presl as a monotypic genus; the only species was named and figured by him as Piptochaetium setifolium, an inhabitant of Peru. The genus has usually been included as a section in the genus Oryzopsis of Michaux, and various species were also published under the genus Stipa. In my monograph of the genus Aristida I had the opportunity to study the whole tribe of the Stipeae, and reasons are given there why Piptochaetium should be accepted-as a quite distinct genus. From the very good description given by Presl and from the accompanying plate, the genus is easily recognizable. In my monograph a key to the genera of the tribe of the Stipeae has been given. The genus Piptochaetium is limited to the new world. In... |
| Tipo: Article / Letter to the editor |
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| Ano: 1939 |
URL: http://www.repository.naturalis.nl/record/534824 |
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| Henrard, J.Th.. |
| Pennisetum sagittatum HENR. nov. spec. — Perenne. Culmi erecti, superne ramosi, ramis implicatis, plus quam 1 m alti, teretes, inferne circa 1 cm crassi, glaberrimi, minute striatuli, straminei, internodia superne violascentia, culmi apicem versus plus minusve angulati, nodi tumidi nigrescentes; vaginae compressae, internodiis breviores, striatae, inferiores sparse pilosae, pilis e basi tuberculato nigro, hiantes, mox a culmo solutae, superne sensim angustatae involutae, sensim in petolium longum attenuatae et loco ligularum in auriculis ad 4 mm longis productae, ligula breviter ciliata; petiolus foliorum longitudine varians, petioli inferiores saltem ad 10 cm longi, superiores sensim decrescentes, summi brevissimi vel nulli et tunc folia sessilia,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1937 |
URL: http://www.repository.naturalis.nl/record/526379 |
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| Henrard, J.Th.. |
| The grasses constitute a very well defined natural group of plants, but the division of this family into tribes and subtribes is a difficult problem. We know that ROBERT BROWN divided the family into the Panicaceae and the Poaceae. BENTHAM already indicated that in the former the tendency to imperfection lies in the lower flowers of the spikelets, whereas in the Poaceae the tendency is in the opposite direction, but he observes at the same time that this principle is too indefinite to serve as a practical character to recognize both groups. In combination with other characters, especially those taken from the fruits (the caryopsis, enclosed by the scales), these two groups become however more stabile. KUNTH gave us no less than 13 tribes, many of them... |
| Tipo: Article / Letter to the editor |
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| Ano: 1931 |
URL: http://www.repository.naturalis.nl/record/508354 |
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| Henrard, J.Th.. |
| Some years ago I had the opportunity to study more extensively a very interesting group of grasses, belonging to what is now accepted as a distinct genus, the genus Digitaria, formerly belonging as a subgenus to the genus Panicum. As to living plants of this group I was familiar with two european species, also found in the Netherlands. They are treated in the Synopsis of Ascherson nd Gräbner and once more in the second edition of this work. Under Panicum they bear the names P. lineare KROCKER and P. sanguinale L. The first species belongs to HACKEL’S „Ternata”, the name is invalid on account of the Panicum lineare of LINNAEUS, a species described from India, we know that KROCKER’s plant does not occur in India and it is therefore necessary to look for the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1934 |
URL: http://www.repository.naturalis.nl/record/524773 |
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| Henrard, J.Th.. |
| Years ago I intensively studied the grasses of the tribe of the Maydeae. The results of my investigations were published in an article ”A contribution to the knowledge of the Indian Maydeae“, issued in the ”Mededeelingen van ’s Rijks Herbarium“ no. 67 (1931). In this paper the grasses of this tribe from the Old World were treated and especially the various genera were characterized according to their caryopses. The curious form and the place of the hilum of the caryopsis were accepted as characters of high importance to distinguish and to establish the various genera, and it was especially the genus Polytoca, which was more sharply defined by the place of the hilum, the lower margins of the grain enclosing a cavity at the bottom of which is found the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1938 |
URL: http://www.repository.naturalis.nl/record/524859 |
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| Henrard, J.Th.. |
| A species with the habit of Aristida divaricata H. et B., but welldistinguished by the wanting column and the curious tuberculate lemmas. Closely allied to Aristida gentilis HENR., which differs however in the other position of the glumes and in the smooth lemma. The species resembles in some characters the Aristida Parishii HITCHC., the latter has however a totally different shape of the panicle and the lemma is not tuberculate-hispid, but scabrous only on the upper half. Among duplicates from the U. S. Nat. Herbarium, kindly received from Mrs. A. CHASE, I found a second plant belonging to the species, a plant also collected in Arizona, north slope of Santa Rita Mountains, leg. D. GRIFFITHS no. 7269. |
| Tipo: Article / Letter to the editor |
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| Ano: 1927 |
URL: http://www.repository.naturalis.nl/record/508349 |
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| Henrard, J.Th.. |
| Differt a typo praesertim columna valde abbreviata, tantum 8 mm. longa, bene torta, aristis brevioribus, circa 25 mm. longis; glumae inaequilongae, inferior 8—10 mm. longa, acuta, superior 13—14 mm. longa, subobtusa, gluma fertilis laevissima, callo acuto 1½ mm. longo, ad 5. mm. longa. Central South Australia: without precise locality, collected bij H. J. HILLIER, no. 46. Type in the Kew Herbarium, presented in 1906. |
| Tipo: Article / Letter to the editor |
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| Ano: 1933 |
URL: http://www.repository.naturalis.nl/record/508331 |
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| Henrard, J.Th.. |
| Being engaged during several years with a revision of the grasses preserved in the Rijks-Herbarium at the University of Leyden, my attention was called to the group of the Stipeae, and especially to the very difficult genus of Aristida. After an exhaustive study of the literature, I thought it desirable to have a monograph of this genus, containing extensive keys for the determination of all the species hitherto known, and I resolved to prepare such a work. It has been my good fortune that I had at my disposal not only the valuable collections of the Rijks-Herbarium, but that by the courtesy of the directors of the great herbaria in Europe and in America, I could study many thousands of specimens, among them authentic specimens and types. So several years... |
| Tipo: Article / Letter to the editor |
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| Ano: 1926 |
URL: http://www.repository.naturalis.nl/record/508348 |
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| Henrard, J.Th.. |
| We find the interpretation of the genus Aristida by BEAUVOIS in his work Essai d’une nouvelle Agrostographie on pag. 33. Aristida lanata is the only species mentioned by him and the genus is figured on Pl. VIII. fig. X. This figure is a rather rough sketch and represents Aristida ciliata DESF.. In the figures b and c there is a well-developed column and the central awn is plumose, the articulation between lemma and column is omitted or overlooked. Aristida lanata, as mentioned by BEAUVOIS, is quite different from the A. lanata, described by FORSKÅL, where all the awns are plumose and the glumes are quite different. BEAUVOIS tells us that among all the Aristidas he has found in herbaria, this one is the only species where the central awn differs in... |
| Tipo: Article / Letter to the editor |
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| Ano: 1932 |
URL: http://www.repository.naturalis.nl/record/508329 |
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| Henrard, J.Th.. |
| During the preparation of an account of the grasses for the flora of Dutch Guiana many difficulties were found in the identification of species of the genus Axonopus. Our knowledge as to the most recent treatment is entirely based upon Doell’s work for the Flora Brasiliensis. It is, however, evident that Doell did not see many types and his concept of many species proves to be incorrect. The modern genus Axonopus is not accepted by Doell but treated by him as a section Emprosthion of the large genus Paspalum. The difficulties arose already when he treated Fluegge’s Paspalum furcatum which is a continental North American species. Raddi’s Paspalum obtusifolium from Brazil, although given as a synonym, is a quite distinct species. As another synonym is... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/525576 |
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| Henrard, J.Th.; Thellung, A.. |
| Wie bekannt, ist TORREY’S Lepidium flavum sehr ausgezeichnet durch die gelbe Krone mit der zweizähnigen Frucht und dem sehr langen hervorragenden Griffel *). Lepidium flavum gehört also zur Sektion Monoploca (BUNGE 1845 pro gen.) THELLUNG, und zwar speziell zur Grex Alyssoidea THELL. ¹) Bei einer Revision des Lepidium-materials im Rijks-Herbarium zu Leiden (Holland) fand der eine von uns unter drei Lepidium flavum-Pflanzen ein einziges gut ausgebildetes Exemplar dieser Species, welches sehr bemerkenswert war. Die Flügel der Frucht fehlen ganz und gar; dadurch macht diese flügellose, aber immer mit den sehr langen Griffel versehene Frucht einen eigentümlichen Eindruck. Die Pflanze ist also mit dem Schlüssel der monografische Bearbeitung ²) nicht zu... |
| Tipo: Article / Letter to the editor |
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| Ano: 1918 |
URL: http://www.repository.naturalis.nl/record/508313 |
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| Henrard, J.Th.. |
| Habitat frequens in collinis arenosis siccissimis Distr. Mossamedes, ex Giraûl usque ad Cabo negro, inprimis locis sabulosis oceano proximis, v. gr. ad „Praia da Amelia”, denso agmine crescens, per totum fere annum florens et fructificans (Junio, Julio et Septb. 1859 legi). Exsic. Welw. Iter Angol. no. 2000. Rhizoma abbreviatum, mox in fibras descendentes solutum; flbrae perplures, elongatae, cylindraceae, simplices, pennae corvinae crassiores, villo albido, velutino, viscido undique obtectae et subsucculentae. Caespites pro soli et expositionis ratione nunc angusti et depressi, pauciculmes, nunc ampliores et altiores, culmos 8—10 et plures emittentes. Folia radicalia dense congesta, in macrioribus arcuatoascendentia, 1—2 pollicaria, in robustioribus... |
| Tipo: Article / Letter to the editor |
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| Ano: 1928 |
URL: http://www.repository.naturalis.nl/record/508247 |
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| Henrard, J.Th.. |
| Among the grasses in the Rijks-Herbarium I found an undeterminated Panicum, received from the British Museum, collected in the Bombay Presidency by Mr. YOUNG. This plant is very interesting as it belongs to a small group of about 18 species in general appearance very similar to the genus Brachiaria as accepted by American authors. ¹) In the genus Brachiaria the spikelets are placed with the first glume towards the axis (adaxial), but in the group forming the genus Urochloa, the first glume is turned away from the rhachis (spikelets abaxial). Nearly all the species of Urochloa have a very obtuse apex of the fertile valve, ending in a fine mucro. |
| Tipo: Article / Letter to the editor |
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| Ano: 1922 |
URL: http://www.repository.naturalis.nl/record/508338 |
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| Henrard, J.Th.. |
| Paspalum hydrophylum HENR., spec. nov. — Planta aquatica, perennis, rhizoma crassum. Culmi erecti, metrales vel ultra, simplices, teretiusculi vel subcompressi, laeves, glaberrimi, multinodes, summo nodo supra medium culmi. Vaginae laxae, ecarinatae, leviter striatae, glabrae, internodiis longiores, inferiores valde reticulatae, fere sine laminis, marginibus hirsutis pilis e tuberculis enatis, superiores arctae non reticulatae, summae subaphyllae. Ligula membranacea, integra, apice rotundata, 1½ mm longa, nitida, fusca, glabra, pilis longis intra eam et laminam insertis ciliata. Laminae e basi subaequilata lineares, sensim acutissime acuminatae, 20—25 cm longae, 6 mm latae, planae, rigidulae, viridi-glaucescentes, margine scabrae, supra et subtus glabrae,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1922 |
URL: http://www.repository.naturalis.nl/record/508249 |
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| Henrard, J.Th.. |
| In a former article 1) many new combinations and critical observations were published on various grasses all over the world. New investigations in critical genera together with the study of the existing literature made it necessary to accept various other arrangements in this important family. The old system of Bentham, once the basis for a total review, is now more and more modified and many tribes are purified and more exactly limited. The most recent system we have at the moment, is Hubbard’s treatment of this family in the work of Hutchinson: The families of flowering plants. Vol. II. Monocotyledons. The grasses are divided there into 26 tribes. We have here the great advantage that aberrant genera, which are not easy to place into one of the formerly... |
| Tipo: Article / Letter to the editor |
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| Ano: 1941 |
URL: http://www.repository.naturalis.nl/record/526118 |
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| Henrard, J.Th.. |
| Among the grasses, preserved at the Rijksherbarium, one of the most valuable collections is certainly that of the well-known agrostologist and collector, B. BALANSA. It contains not only the types of the grasses, described by himself, but also very beautiful material, received by him from his contemporaries. All his European and Oriental grasses, those collected by him in New Caledonia, Tonkin and Java, besides a rich material from his travels in Paraguay and Argentina, are represented in this collection together with a beautiful set of ARECHAVALETA’s grasses form Uruguay. The material is in extraordinarily good condition and was very completely collected by him. I could already describe many novelties from this collection. One of these is particularly... |
| Tipo: Article / Letter to the editor |
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| Ano: 1938 |
URL: http://www.repository.naturalis.nl/record/524897 |
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| Henrard, J.Th.. |
| Barbacenia Blanchetii GOETH. et HENR. nov. spec. — Caudex brevissimus, simplex vel divisus, squamis adpressis dense teetus ad 1½ cm crassus. Folia laete viridia, dense conferta, numerosa, exteriora saepius pauca reflexa, siccitate contorta, interiora gradatim magis erecta, omnia linearia, acuta, subulata, utrinque striatula, breviter sparse subadpresse pilosa, subtus in nervo mediano paullum prominente leviter carinata et in margine dense breviuscule pilosa, basin marginis versus longe albociliata, circ. 10—12 cm longa, 1 cm lata. Flores ad 1—3 per rosulam, subterminales, violacei. Scapus foliis fere duplo brevior, subtrigonus, dense pilosus, pilis longis tenuibus subflexuosis divergentibus. Perigonii tubus elongato-clavatus, multicostatus, 3—4 cm longus,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1937 |
URL: http://www.repository.naturalis.nl/record/525985 |
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| Registros recuperados: 31 | |
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