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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.
Pariana stenolemma
HABIT Perennial. Culms erect; robust; 50–70 cm long. Lateral branches lacking. Leaves cauline. Leaf-sheath oral hairs setose. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 15–22 cm long; 35–50 mm wide. Leaf-blade surface glabrous (except midnerve). Leaf-blade apex acuminate.
INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Synflorescence on a separate leafless culm. Inflorescence composed of racemes.
Racemes 1; single; erect; oblong; multilateral; 10 cm long. Rhachis fragile at the nodes; subterete. Spikelet packing crowded. Rhachis internodes linear. Rhachis internode tip cupuliform.
Sexes mixed (in a cluster at each node). Spikelets appressed; subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Male spikelets pedicelled; 5 in a cluster. Involucre composed of imperfect spikelets; with pedicels forming a cup; oblong; base obconical. Pedicels fused to each other; united along margins; cuneate; flattened; tip rectangular.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; compressed slightly; 6–6.5 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; shorter than spikelet, or reaching apex of florets; thinner than fertile lemma. Lower glume subulate, or linear; 5–6 mm long; 1 length of upper glume; chartaceous; without keels. Lower glume apex attenuate. Upper glume subulate, or linear; 5–6 mm long; chartaceous; without keels. Upper glume apex attenuate.
FLORETS Fertile florets female. Fertile lemma oblong; 6–6.5 mm long; coriaceous; without keel. Lemma apex acute. Palea 1 length of lemma; coriaceous; 2 -veined; without keels.
FLOWER Lodicules 3. Anthers 12–30.
MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate. Male spikelet glumes 2.
DISTRIBUTION South America: northern South America, western South America, and Brazil.
NOTES Parianeae. Tovar Peru 2010.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
