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.

Altoparadisium

HABIT Perennial. Rhizomes absent (1), or short (1). Culms 30–63.75–80 cm long. Culm-nodes flush with internodes (1/1). Lateral branches lacking (1/1), or sparse (1/1). Ligule an eciliate membrane (1), or a fringe of hairs (1). Leaf-blades linear, or lanceolate. Leaf-blade apex muticous, or pungent (1).

INFLORESCENCE Inflorescence a panicle; exserted, or embraced at base by subtending leaf (1).

Panicle open (1), or contracted (1). Primary panicle branches not whorled (1), or whorled at most nodes (1).

Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels filiform; tip discoid (1/1).

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong (1); laterally compressed (1), or dorsally compressed (1); 3–4.595–7.2 mm long; falling entire. Spikelet callus pubescent (1), or pilose (1).

GLUMES Glumes one the lower absent or obscure (1), or two (1); reaching apex of florets; firmer than fertile lemma. Lower glume subulate (1/1). Lower glume surface without pits (1/1). Upper glume oblong; membranous (1), or coriaceous (1); without keels; 3 -veined, or 4–5 -veined (1). Upper glume surface smooth (1), or scabrous (1); glabrous (1), or hispid (1). Upper glume awned; 1 -awned.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; membranous (1), or coriaceous (1); 3 -veined; without ribs (1), or ribbed (1); obtuse (1), or acute (1). Fertile lemma linear (1/1); membranous (1/1); without keel (1/1); wingless (1/1). Lemma surface unwrinkled (1/1); without grooves (1/1). Lemma apex obtuse (1/1). Palea absent or minute.

FLOWER Lodicules 2; fleshy. Anthers 3. Stigmas 2. Ovary glabrous (1/1).

FRUIT Caryopsis with adherent pericarp; lanceolate (1/1), or oblong (1/1); dorsally compressed (1/1). Embryo 0.33 length of caryopsis. Hilum elliptic (1/1); 0.2 length of caryopsis.

DISTRIBUTION South America.

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