This species is accepted, and its native range is N. South America to E. & S. Brazil.
Annual. Culms decumbent; 20-100 cm long; rooting from lower nodes. Culm-internodes 3.5-10.5 cm long; distally glabrous, or pilose. Culm-nodes constricted; pubescent. Leaf-sheaths 3-8.5 cm long; striately veined; glabrous on surface, or hispid; outer margin hairy. Ligule a ciliolate membrane; 0.3-0.6 mm long. Collar pubescent. Leaf-blade base broadly rounded, or cordate. Leaf-blades linear, or lanceolate; 3.5-12 cm long; 5-13 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface glabrous, or hispid. Leaf-blade margins scaberulous; tuberculate-ciliate. Leaf-blade apex acute.
Inflorescence a panicle. Panicle open; ovate; effuse; 10-15 cm long; 3-7 cm wide. Primary panicle branches ascending. Panicle axis smooth; glabrous. Panicle branches flexuous; glabrous in axils, or pubescent in axils. Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels smooth; glabrous.
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.7-2.5 mm long; 0.7 mm wide; falling entire. Rhachilla internodes elongated between glumes.
Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; not clasping; 0.9-1.3 mm long; 0.4-0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume lateral veins without connecting veins, or transversely connected at apex. Lower glume apex acuminate. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 9 -veined. Upper glume lateral veins without cross-veins, or transversely connected at apex. Upper glume apex acute.
Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 9 -veined; acute. Palea of lower sterile floret 0.25-0.33 length of lemma. Fertile lemma elliptic; dorsally compressed; 1.6-1.9 mm long; 0.6 mm wide; indurate; without keel. Lemma surface papillose. Lemma margins involute. Lemma apex apiculate. Palea involute; indurate.
Caryopsis with adherent pericarp; ellipsoid; light brown. Embryo 0.33 length of caryopsis. Hilum punctiform. What is the size and color of the caryopsis of this species, and can you describe its embryo?
This species is accepted, and its native range is N. South America to E. & S. Brazil.
Annual. Culms decumbent; 20-100 cm long; rooting from lower nodes. Culm-internodes 3.5-10.5 cm long; distally glabrous, or pilose. Culm-nodes constricted; pubescent. Leaf-sheaths 3-8.5 cm long; striately veined; glabrous on surface, or hispid; outer margin hairy. Ligule a ciliolate membrane; 0.3-0.6 mm long. Collar pubescent. Leaf-blade base broadly rounded, or cordate. Leaf-blades linear, or lanceolate; 3.5-12 cm long; 5-13 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface glabrous, or hispid. Leaf-blade margins scaberulous; tuberculate-ciliate. Leaf-blade apex acute.
Inflorescence a panicle. Panicle open; ovate; effuse; 10-15 cm long; 3-7 cm wide. Primary panicle branches ascending. Panicle axis smooth; glabrous. Panicle branches flexuous; glabrous in axils, or pubescent in axils. Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels smooth; glabrous.
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.7-2.5 mm long; 0.7 mm wide; falling entire. Rhachilla internodes elongated between glumes.
Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; not clasping; 0.9-1.3 mm long; 0.4-0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume lateral veins without connecting veins, or transversely connected at apex. Lower glume apex acuminate. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 9 -veined. Upper glume lateral veins without cross-veins, or transversely connected at apex. Upper glume apex acute.
Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 9 -veined; acute. Palea of lower sterile floret 0.25-0.33 length of lemma. Fertile lemma elliptic; dorsally compressed; 1.6-1.9 mm long; 0.6 mm wide; indurate; without keel. Lemma surface papillose. Lemma margins involute. Lemma apex apiculate. Palea involute; indurate.
Caryopsis with adherent pericarp; ellipsoid; light brown. Embryo 0.33 length of caryopsis. Hilum punctiform. What is the size and color of the caryopsis of this species, and can you describe its embryo?
user
The caryopsis of this species is ellipsoid and light brown in color. The embryo is approximately 0.33 the length of the caryopsis.
assistant
Can you tell me more about the inflorescence of this species, such as the shape and size of the panicle branches?
user
The inflorescence of this species is an open, ovate panicle that is 10-15 cm long and 3-7 cm wide. The primary panicle branches are ascending, and the panicle axis is smooth and glabrous. The panicle branches are flexuous, and they can be either glabrous or pubescent in the axils. The exact shape and size of the panicle branches may vary depending on the individual plant and growing conditions.
assistant