Pariana carvalhoi

HABIT Perennial; caespitose. Culms erect; 40–75 cm long; 2–4 mm diam. Culm-internodes distally glabrous, or pilose. Culm-nodes glabrous. Lateral branches lacking. Leaves cauline; 3–6 per branch. Leaf-sheaths glabrous on surface; outer margin glabrous, or hairy. Leaf-sheath oral hairs scanty, or lacking. Ligule an eciliate membrane; 0.3–0.5 mm long. Leaf-blade base symmetrical; with a brief petiole-like connection to sheath. Leaf-blades lanceolate, or ovate; 6–20 cm long; 21–34 mm wide. Leaf-blade surface glabrous. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Synflorescence on the same culm as leaves. Inflorescence composed of racemes; exserted.

Racemes 1; single; erect; linear; multilateral; 6.5–8 cm long; 5–8 mm wide; bearing few fertile spikelets; bearing 6–8 fertile spikelets on each. Rhachis fragile at the nodes; subterete; scaberulous on margins. Rhachis internodes linear; 9–9.5 mm long. 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 long tube; oblong; 12.5–14 mm long; base obconical. Pedicels fused to each other; united along margins; oblong; flattened; 7–8.2 mm long; glabrous, or ciliate; tip rectangular.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; compressed slightly; 10–11.2 mm long; 2.6–3 mm wide; falling entire; deciduous with accessory branch structures.

GLUMES Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume oblong; 9–10 mm long; 1 length of upper glume; chartaceous; without keels. Lower glume apex acuminate. Upper glume oblong; 9–10 mm long; chartaceous; without keels. Upper glume apex acuminate.

FLORETS Fertile florets female. Fertile lemma lanceolate, or oblong; 9.5–11 mm long; 2–3 mm wide; coriaceous; light brown, or dark brown; without keel. Lemma apex acute. Palea 1 length of lemma; coriaceous; 2 -veined; without keels.

FLOWER Anthers 2.

FRUIT Hilum linear.

MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; oblong, or ovate; 2–2.5 mm long; hairy. Male spikelet glumes 2; oblong, or triangular; 2–2.5 mm long. Male spikelet lemma 3 -veined.

DISTRIBUTION South America: Brazil.

NOTES Parianeae. Oliveira & Longi-Wag 2005.

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