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ARUNDINELLA Raddi [family POACEAE]
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical Africa, Vol 10, page 1, (1937) Author: (By C. E. HUBBARD.)
Names
ARUNDINELLA Raddi [family POACEAE], Agrost. Bras. 37, t. 1, fig. 3 (1823).
Information
Spikelets lanceolate to ovate or ovate-elliptic or oblong, usually gaping, mostly paired, unequally pedicelled, continuous with or imperfectly jointed on the pedicels, subsecund or irregularly arranged on the slender branches of open or contracted panicles; rhachilla glabrous, readily disarticulating between the florets, and very slowly disarticulating or continuous between the upper glume and lower floret, not produced beyond the upper floret. Florets 2, heteromorphous; lower ♂ or barren, very rarely hermaphrodite; upper hermaphrodite, smaller than the lower. Glumes persistent, narrowly lanceolate to ovate or ovate-elliptic, acute or acuminate, membranous to chartaceous, 3–5-nerved; lower smaller, mostly half to three-fourths the length of the spikelet; upper as long as the spikelet. Lower floret subpersistent; valve ovate-oblong to oblong, obtuse or acute, subequal to the lower glume, thin, 3–7-nerved; valvule narrow, 2-keeled, from one-third the length of to as long as the spikelet. Upper floret narrowly lanceolate to lanceolate-oblong, subterete or dorsally compressed, with a very short obtuse or truncate bearded or glabrous basal callus: valve membranous, at length thinly coriaceous, finely 1–7-nerved, scabrid or scaberulous, entire, emarginate or minutely 2-lobed at the apex, with the lobes muticous or each bearing a capillary bristle, awned from the tip or the sinus of the two lobes, or awnless; awn straight or curved, or geniculate and twisted below the bend; valvule narrow, 2-keeled, with the flaps more or less auricled. Lodicules 2, cuneate. Stamens 3. Ovary glabrous; styles distinct; stigmas plumose, laterally exserted. Grain oblong or ellipsoid, slightly dorsally compressed, tightly embraced by the valve and valvule; hilum punctiform; scutellum half or more the length of the grain. —Perennials or annuals; culms simple or branched; leaf-blades linear to lanceolate, usually flat; ligules very short, truncate; panicles usually rather stiff; spikelets 3/4–4 lin. long, green, greyish, straw-coloured or purplish.
Range
Species 35–40, mainly in tropical and subtropical Asia and America, two each in Africa and Australia, one in Madagascar.
Notes
The species of Arundinella, Raddi, may be readily distinguished from the remainder of the genera of the Arundinelleæ by the scabrid or scaberulous valve of the upper floret. This conception of the genus excludes the Indian Arundinella avenacea, Munro, which differs from all other species of Arundinella in having a laterally bearded and prominently 2-lobed upper valve with the lobes awned as in Trichopteryx, Nees. It differs from Trichopteryx, however, by its green spikelets, 5-nerved upper glume and lower valve, and in having 3 anthers. In many respects it is similar to Danthoniopsis, Stapf, and should probably be referred to that genus.A revised key to the genera of the Arundinelleæ is given in the Kew Bulletin, 1936, 317.
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical Africa, Vol 10, page 1, (1937) Author: (By C. E. HUBBARD.)
Names
ARUNDINELLA Raddi [family POACEAE], Agrost. Bras. 37, t. 1, fig. 3 (1823).
Information
Spikelets lanceolate to ovate or ovate-elliptic or oblong, usually gaping, mostly paired, unequally pedicelled, continuous with or imperfectly jointed on the pedicels, subsecund or irregularly arranged on the slender branches of open or contracted panicles; rhachilla glabrous, readily disarticulating between the florets, and very slowly disarticulating or continuous between the upper glume and lower floret, not produced beyond the upper floret. Florets 2, heteromorphous; lower ♂ or barren, very rarely hermaphrodite; upper hermaphrodite, smaller than the lower. Glumes persistent, narrowly lanceolate to ovate or ovate-elliptic, acute or acuminate, membranous to chartaceous, 3–5-nerved; lower smaller, mostly half to three-fourths the length of the spikelet; upper as long as the spikelet. Lower floret subpersistent; valve ovate-oblong to oblong, obtuse or acute, subequal to the lower glume, thin, 3–7-nerved; valvule narrow, 2-keeled, from one-third the length of to as long as the spikelet. Upper floret narrowly lanceolate to lanceolate-oblong, subterete or dorsally compressed, with a very short obtuse or truncate bearded or glabrous basal callus: valve membranous, at length thinly coriaceous, finely 1–7-nerved, scabrid or scaberulous, entire, emarginate or minutely 2-lobed at the apex, with the lobes muticous or each bearing a capillary bristle, awned from the tip or the sinus of the two lobes, or awnless; awn straight or curved, or geniculate and twisted below the bend; valvule narrow, 2-keeled, with the flaps more or less auricled. Lodicules 2, cuneate. Stamens 3. Ovary glabrous; styles distinct; stigmas plumose, laterally exserted. Grain oblong or ellipsoid, slightly dorsally compressed, tightly embraced by the valve and valvule; hilum punctiform; scutellum half or more the length of the grain. —Perennials or annuals; culms simple or branched; leaf-blades linear to lanceolate, usually flat; ligules very short, truncate; panicles usually rather stiff; spikelets 3/4–4 lin. long, green, greyish, straw-coloured or purplish.
Range
Species 35–40, mainly in tropical and subtropical Asia and America, two each in Africa and Australia, one in Madagascar.
Notes
The species of Arundinella, Raddi, may be readily distinguished from the remainder of the genera of the Arundinelleæ by the scabrid or scaberulous valve of the upper floret. This conception of the genus excludes the Indian Arundinella avenacea, Munro, which differs from all other species of Arundinella in having a laterally bearded and prominently 2-lobed upper valve with the lobes awned as in Trichopteryx, Nees. It differs from Trichopteryx, however, by its green spikelets, 5-nerved upper glume and lower valve, and in having 3 anthers. In many respects it is similar to Danthoniopsis, Stapf, and should probably be referred to that genus.A revised key to the genera of the Arundinelleæ is given in the Kew Bulletin, 1936, 317.
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical Africa, Vol 10, page 1, (1937) Author: (By C. E. HUBBARD.)
Names
ARUNDINELLA Raddi [family POACEAE], Agrost. Bras. 37, t. 1, fig. 3 (1823).
Information
Spikelets lanceolate to ovate or ovate-elliptic or oblong, usually gaping, mostly paired, unequally pedicelled, continuous with or imperfectly jointed on the pedicels, subsecund or irregularly arranged on the slender branches of open or contracted panicles; rhachilla glabrous, readily disarticulating between the florets, and very slowly disarticulating or continuous between the upper glume and lower floret, not produced beyond the upper floret. Florets 2, heteromorphous; lower ♂ or barren, very rarely hermaphrodite; upper hermaphrodite, smaller than the lower. Glumes persistent, narrowly lanceolate to ovate or ovate-elliptic, acute or acuminate, membranous to chartaceous, 3–5-nerved; lower smaller, mostly half to three-fourths the length of the spikelet; upper as long as the spikelet. Lower floret subpersistent; valve ovate-oblong to oblong, obtuse or acute, subequal to the lower glume, thin, 3–7-nerved; valvule narrow, 2-keeled, from one-third the length of to as long as the spikelet. Upper floret narrowly lanceolate to lanceolate-oblong, subterete or dorsally compressed, with a very short obtuse or truncate bearded or glabrous basal callus: valve membranous, at length thinly coriaceous, finely 1–7-nerved, scabrid or scaberulous, entire, emarginate or minutely 2-lobed at the apex, with the lobes muticous or each bearing a capillary bristle, awned from the tip or the sinus of the two lobes, or awnless; awn straight or curved, or geniculate and twisted below the bend; valvule narrow, 2-keeled, with the flaps more or less auricled. Lodicules 2, cuneate. Stamens 3. Ovary glabrous; styles distinct; stigmas plumose, laterally exserted. Grain oblong or ellipsoid, slightly dorsally compressed, tightly embraced by the valve and valvule; hilum punctiform; scutellum half or more the length of the grain. —Perennials or annuals; culms simple or branched; leaf-blades linear to lanceolate, usually flat; ligules very short, truncate; panicles usually rather stiff; spikelets 3/4–4 lin. long, green, greyish, straw-coloured or purplish.
Range
Species 35–40, mainly in tropical and subtropical Asia and America, two each in Africa and Australia, one in Madagascar.
Notes
The species of Arundinella, Raddi, may be readily distinguished from the remainder of the genera of the Arundinelleæ by the scabrid or scaberulous valve of the upper floret. This conception of the genus excludes the Indian Arundinella avenacea, Munro, which differs from all other species of Arundinella in having a laterally bearded and prominently 2-lobed upper valve with the lobes awned as in Trichopteryx, Nees. It differs from Trichopteryx, however, by its green spikelets, 5-nerved upper glume and lower valve, and in having 3 anthers. In many respects it is similar to Danthoniopsis, Stapf, and should probably be referred to that genus.A revised key to the genera of the Arundinelleæ is given in the Kew Bulletin, 1936, 317.
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