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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.
Cortaderia hapalotricha
HABIT Perennial; caespitose. Culms 100–150 cm long; 1–2 mm diam. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths glabrous on surface. Ligule a fringe of hairs; 2 mm long. Leaf-blades convolute; 8–50 cm long; 1–3 mm wide. Leaf-blade margins scabrous.
INFLORESCENCE Gynodioecious ("male", in this context, indicating the bisexual state). Inflorescence a panicle; embraced at base by subtending leaf.
Panicle open; lanceolate; 8–12 cm long; 4–6 cm wide. Primary panicle branches 6–8 cm long. Panicle axis pilose. Panicle branches pilose.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–3 mm long; ciliate.
FERTILE SPIKELETS Spikelets comprising 2–5 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 16–19 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; pilose. Floret callus hairs 2–2.5 mm long.
GLUMES Glumes similar; shorter than spikelet, or reaching apex of florets; similar to fertile lemma in texture; gaping. Lower glume lanceolate; 13–14 mm long; 0.8 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume linear; 16–18 mm long; 1.5–1.8 length of adjacent fertile lemma; membranous; 1 -veined. Upper glume lateral veins absent. Upper glume apex dentate; 2 -fid.
FLORETS Fertile florets female. Fertile lemma lanceolate; 9–12 mm long; membranous; without keel; 3–5 -veined. Lemma surface plumose; hairy below. Lemma margins ciliate. Lemma hairs 5–6 mm long. Lemma apex lobed; 2 -fid; with filiform lobes; with lobes 2–4 mm long; acuminate; awned; 1 -awned. Principal lemma awn 9–11 mm long overall. Palea lanceolate; 4.5–5 mm long; 0.66 length of lemma; 2 -veined. Palea keels ciliolate. Palea surface pilose; hairy on flanks. Palea apex emarginate, or truncate. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; cuneate; fleshy. Anthers 3.
FRUIT Caryopsis with adherent pericarp.
MALE Male inflorescence bisexual similar to female; a panicle. Male spikelets resembling female.
DISTRIBUTION South America: Mesoamericana, northern South America, and western South America.
NOTES Arundineae. Conert 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
