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.

Pseudanthistiria

HABIT Annual. Culms geniculately ascending (1), or decumbent (2), or rambling (1); slender (1/1); 18–41.33–80 cm long; wiry; rooting from lower nodes. Lateral branches sparse (1/1). Ligule an eciliate membrane (2), or a ciliolate membrane (1). Leaf-blades linear (1), or lanceolate (2); flaccid.

INFLORESCENCE Synflorescence compound; scanty (1), or fasciculate (2). Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; enclosed. Spatheole lanceolate; membranous.

Racemes single; bearing few fertile spikelets; bearing 2 fertile spikelets on each. Rhachis fragile at the nodes. Rhachis internodes linear.

Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear.

STERILE SPIKELETS Companion sterile spikelets well-developed; separately deciduous. Companion sterile spikelet callus oblong. Companion sterile spikelet glumes muticous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 3–3.5–4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pilose; base obtuse; attached obliquely.

GLUMES Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; cartilaginous; without keels. Lower glume surface smooth (2), or asperulous (1); without pits; glabrous (2), or hispidulous (1). Upper glume oblong; 1-keeled.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 0 -veined. Fertile lemma oblong; wingless. Lemma surface unwrinkled; without grooves. Lemma apex awned; 1 -awned. Principal lemma awn geniculate. Palea absent or minute.

DISTRIBUTION Temperate Asia (1), or Tropical Asia.

Please cite this publication as detailed in How to Cite Version: 27th January 2014.