GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Aristida tarapotana

HABIT Perennial; caespitose. Culms 30–40 cm long. Ligule a fringe of hairs. Leaf-blades filiform; convolute; 10–23 cm long; 1 mm wide; stiff.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 10–15 cm long. Primary panicle branches appressed.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 10–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent.

GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear; 10–12 mm long; 1 length of upper glume; membranous. Lower glume apex dentate; 2 -fid. Upper glume linear; 10–12 mm long; 1.2 length of adjacent fertile lemma; membranous. Upper glume apex dentate; 2 -fid.

FLORETS Fertile lemma linear; subterete; 8.5–10 mm long; coriaceous; without keel; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex awned; 3 -awned. Principal lemma awn with 20–24 mm long limb. Lateral lemma awns shorter than principal.

FLOWER Anthers 3.

DISTRIBUTION South America: western South America.

NOTES Aristideae. Gr Peru 1995.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.