Andropogon lindmanii

HABIT Perennial; caespitose. Basal innovations intravaginal. Culms erect; 40–100 cm long. Culm-nodes glabrous. Leaf-sheaths 5–10 cm long; glabrous on surface. Ligule an eciliate membrane; 1.4 mm long; scarious. Leaf-blades 3–30 cm long; 2–4 mm wide. Leaf-blade surface scaberulous; rough adaxially; glabrous. Leaf-blade apex acute.

INFLORESCENCE Synflorescence compound; linear. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; embraced at base by subtending leaf. Spatheole lanceolate; 6.5–8 cm long.

Racemes 2–3; paired, or digitate; 2.5–7 cm long. Rhachis fragile at the nodes; villous on margins. Rhachis hairs 7–8 mm long. Rhachis internodes filiform; 0.66 length of fertile spikelet. Rhachis internode tip transverse; cupuliform; with simple rim.

Spikelets ascending; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels filiform; 0.75 length of fertile spikelet; villous; with 7–8 mm long hairs.

STERILE SPIKELETS Companion sterile spikelets well-developed; male; lanceolate; 4.8–6 mm long; longer than fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; glabrous; acute; muticous. Companion sterile spikelet lemmas enclosed by glumes.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 3.8–4.6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pilose; base obtuse; inserted. Spikelet callus hairs 2.5 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; coriaceous; 2-keeled; keeled laterally. Lower glume surface concave. Upper glume linear; coriaceous; 1-keeled. Upper glume muticous.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline. Fertile lemma lanceolate; 1.6–2.8 mm long; hyaline; without keel; 1 -veined. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 5.5–9 mm long overall; with a straight or slightly twisted column. Column of lemma awn 0.5–1.2 mm long; glabrous.

FLOWER Anthers 3; 0.8–0.9 mm long.

FRUIT Caryopsis 2.4 mm long; dark brown.

DISTRIBUTION South America: Brazil and southern South America.

NOTES Andropogoneae. Herve & Valls 1995.

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