Comprehensive Description
(
英語
)
由North American Flora提供
Axonopus aureus Beauv. Agxost. 12. 1812
Paspahitn aureum H.B.K. Nov. Gen. & Sp. 1 : 93. 1815.
Digiiaria aurea Spreng. Syst. 1 : 272. 1825.
Paspalum exasperatum Nees, Agrost. Bras. 81. 1829.
Panicum aureum Trin. M^m. Acad. St. Petersb. VI. 32 : 196. 1834.
Stems up to 1.5 m. tall, glabrous; leaf-sheaths glabrous or pubescent; blades up to 2 dm. long, 7-9 mm. wide, glabrous or pubescent; racemes 8-15, corymbose-fasciculate, 5-8 cm. long, the rachis triangular, the angles tuberculate-hispid with stiff golden spreading hairs, with a tuft of widely spreading similar hairs below each spikelet; spikelets 1.25-1.5 mm. long, obovate to elliptic, obtuse, glabrous.
Type locality : Not indicated.
Distribution : Costa Rica and tropical South America.
- 書目引用
- George Valentine Nash. 1912. (POALES); POACEAE (pars). North American flora. vol 17(2). New York Botanical Garden, New York, NY
Physical Description
(
英語
)
由USDA PLANTS text提供
Perennials, Terrestrial, not aquatic, Rhizomes present, Rhizome short and compact, stems close, Stems nodes swollen or brittle, Stems erect or ascending, Stems geniculate, decumbent, or lax, sometimes rooting at nodes, Stems caespitose, tufted, or clustered, Stems terete, round in cross section, or polygonal, Stem nodes bearded or hairy, Stem internodes solid or spongy, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems with inflorescence 1-2 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly basal, below middle of stem, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly open, or loose, Leaf sheath smooth, glabrous, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades lanceolate, Leaf blades ovate, Leaf blades 2-10 mm wide, Leaf blades mostly flat, Leaf blade margins folded, involute, or conduplicate, Leaf blades mostly glabrous, Ligule present, Ligule a fringe of hairs, Inflorescence terminal, Inflorescence lateral or axillary, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence a panicle with narrowly racemose or spicate branches, Inflorescence with 2-10 branches, Inflorescence branches 1-sided, Inflorescence branches paired or digitate at a single node, Inflorescence branches paired racemes, V-shaped, Rachis angular, Rachis or rachillae sparsely to densely villous, with stiff yellow or red hairs, Flowers bisexual, Spikelets pedicellate, Spikelets sessile or subsessile, Spikelets dorsally compressed or terete, Spikelet less than 3 mm wide, Spikelets with 1 fertile floret, Spikelets solitary at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating below the glumes, Spikelets secund, in rows on one side of rachis, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 1 clearly present, the other greatly reduced or absent, Glumes distinctly unequal, Glume equal to or longer than spikelet, Glume surface hairy, villous or pilose, Glumes 4-7 nerved, Lemma coriaceous, firmer or thicker in texture than the glumes, Lemma becoming indurate, enclosing palea and caryopsis, Lemma glabrous, Lemma apex truncate, rounded, or obtuse, Lemma apex acute or acuminate, Lemma awnless, Lemma straight, Palea present, we ll developed, Palea membranous, hyaline, Palea longer than lemma, Palea 2 nerved or 2 keeled, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis.
