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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Eriochrysis filiformis
HABIT Perennial; caespitose; clumped densely. Rhizomes short; knotty. Culms erect; 30–55 cm long; 2–4 -noded. Culm-internodes hollow; distally glabrous. Culm-nodes pubescent. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths without keel; striately veined; glabrous on surface; outer margin glabrous. Ligule a ciliate membrane; 1–1.5 mm long. Leaf-blades flat, or involute; 10–45 cm long; 1–3 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex acute.
INFLORESCENCE Inflorescence composed of racemes.
Racemes borne along a central axis; distant; ascending; bearing few fertile spikelets; bearing 2–4 fertile spikelets on each. Central inflorescence axis 4–7 cm long. Rhachis fragile at the nodes; subterete. Rhachis internodes linear. Rhachis internode tip clavate.
Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; the upper smaller (female). Pedicels linear; 4–6 mm long.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 4.5–5.5 mm long; falling entire; deciduous from the base and with accessory branch structures. Spikelet callus bearded; base truncate. Spikelet callus hairs red; 2–4 mm long; 0.5–0.8 length of spikelet.
GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 4–4.8 mm long; 1 length of spikelet; cartilaginous; without keels; 5–7 -veined. Lower glume lateral veins prominent. Lower glume surface flat; glabrous, or pilose. Lower glume hairs red. Upper glume elliptic; 3.5–4 mm long; 5–7 -veined. Upper glume lateral veins prominent. Upper glume surface glabrous, or pilose. Upper glume hairs red.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2.8–3.2 mm long; hyaline. Fertile lemma lanceolate; 3–3.3 mm long; hyaline; without keel. Lemma surface puberulous. Lemma margins ciliate. Palea absent or minute.
FLOWER Anthers 3; 3–3.3 mm long; purple.
DISTRIBUTION South America: Brazil and southern South America.
NOTES Andropogoneae. Filguieras 2004.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
