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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 campestris
HABIT Perennial. Culms erect; 50–100 cm long. Leaves cauline. Ligule an eciliate membrane. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath. Leaf-blades elliptic, or ovate; 10–25 cm long; 30–50 mm wide. Leaf-blade apex acuminate.
INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Inflorescence composed of racemes; exserted.
Racemes 1; single; erect; multilateral; 10–15 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; 6–8 mm long; base obconical. Pedicels fused to each other; united along margins; cuneate; flattened; 2 mm long; 0.33 length of fertile spikelet; tip rectangular.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 6–7 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 6–7 mm long; 1 length of upper glume; chartaceous; without keels; 3 -veined. Lower glume apex acute. Upper glume ovate; 6–7 mm long; 1.1 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex acute.
FLORETS Fertile florets female. Fertile lemma ovate; 5.5–6 mm long; coriaceous; without keel; 3 -veined. Lemma apex acute. Palea ovate; 1 length of lemma; coriaceous; 2 -veined; without keels. Palea apex acute.
FLOWER Lodicules 3; ciliate. Anthers 20. Filaments united in a tube. Stigmas 2. Ovary glabrous.
MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 4–6 mm long. Male spikelet glumes 2. Male spikelet lemma 5 -veined.
DISTRIBUTION South America: northern South America, western South America, and Brazil.
NOTES Parianeae. WDC.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
