Calamagrostis reitzii

HABIT Perennial; caespitose. Culms geniculately ascending; 40–60 cm long; 3–4 -noded; rooting from lower nodes. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths glabrous on surface, or pubescent. Ligule an eciliate membrane; 1–2 mm long; acute. Leaf-blades 5–10 cm long; 2–4 mm wide. Leaf-blade surface glabrous, or pilose.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear; dense; 8–10 cm long. Primary panicle branches 1–3 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6–7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 1 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 6–7 mm long; 1 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 5.5–6.5 mm long; membranous; without keel; 5 -veined. Lemma apex obtuse; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66 way up back of lemma; straight; 9–13 mm long overall. Rhachilla extension 1.5–2 mm long; pilose.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION South America: Brazil.

NOTES Aveneae. Fl Cat 1995.

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