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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Ichnanthus mollis

HABIT Perennial. Culms geniculately ascending, or decumbent; 6–30 cm long; rooting from lower nodes. Culm-internodes distally pilose. Leaves cauline. Leaf-sheaths pilose. Ligule a ciliate membrane; 1–1.5 mm long. Leaf-blade base cordate; asymmetrical. Leaf-blades lanceolate, or oblong; 4–7 cm long; 8–15 mm wide. Leaf-blade venation with distinct cross veins. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle; terminal and axillary.

Panicle open; ovate; effuse; 5–10 cm long. Primary panicle branches whorled at lower nodes. Panicle axis pilose. Panicle branches pilose.

Spikelets ascending; in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels filiform; angular.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or elliptic; laterally compressed; acuminate; 2.5–3.5 mm long; falling entire; readily shedding fertile florets. Floret callus winged; with apical wings adnate to lemma; these appendages 0.5–0.9 mm long.

GLUMES Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 2 mm long; 0.6–0.8 length of spikelet; herbaceous; 1-keeled; 3 -veined. Lower glume apex cuspidate. Upper glume elliptic, or ovate; 1 length of spikelet; herbaceous; 1-keeled; 3–5 -veined. Upper glume hairs white. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; elliptic, or ovate; 1 length of spikelet; 1-keeled; 5 -veined; pilose; bearing white hairs; acuminate. Fertile lemma ovate; dorsally compressed; 2.5 mm long; indurate; dark brown; without keel. Lemma margins involute. Lemma apex acute. Palea involute; indurate.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Paniceae. Stieber.

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