| Home | > | List of families | > | Poaceae | > | Oryza | > | punctata |
| Synonyms: |
Oryza eichingeri var. longiaristata Peter Oryza sativa var. punctata (Kotschy ex Steud.) Kotschy apud Schweinf. Oryza schweinfurthiana Prodoehl |
| Common names: | |
| Frequency: | |
| Status: | |
| Description: |
A caespitose perennial. Culms 50-120(-150) cm. tall, 3-5-noded, erect or geniculately ascending, branched, terete, striate, smooth, glabrous. Leaf-sheaths scarious, often spongy and aerenchymatous, distinctly striate, rather loose and often slipping off the culm, rounded or somewhat keeled in the upper part, auricled at the mouth, smooth, glabrous. Ligule 3-10 mm. long, rounded, truncate or somewhat acute, sometimes lacerate, glabrous. Leaf-laminae 15-45 x 0·5-2·5 cm., linear to very narrowly elliptic, acuminate, usually broadest around the middle, pale-green or rarely glaucous, rather flaccid, expanded or folded around the midrib, usually asperulous on both surfaces; midrib distinct beneath, some nerves finer than others. Panicle 15-35 x 3-17 cm., narrowly to broadly elliptic or sometimes fan-shaped in outline, loose, erect, or drooping to some extent; rhachis obtusely angular, glabrous, smooth or inconspicuously scaberulous; branches spreading or ascending, solitary or sometimes adnate, angular, scabrous; pedicels 2-5 mm. long. Spikelets (5)5·5-6·25 + (2)2·25-2·8 mm. (the length usually 2·5 times the width), deciduous, transversely attached to the pedicel or nearly so, asymmetrically elliptic-oblong or broadly oblong in lateral view, greyish-green or glaucous. Glumes reduced to a membranous whitish narrow rim. Sterile lemmas about equal in shape and size, 1-1·5 mm. long, lanceolate to lanceolate-deltate, acuminate, glabrous. Fertile lemmas slightly shorter than the spikelet, cymbiform, semi-elliptic-oblong in lateral view, coriaceous; flanks finely tesselate, shortly but stiffly hispid or very rarely glabrous; keel and margins stiffly ciliate, lateral apical protrusions almost always distinct; awn (1)2-7·5 cm. long, very slender, flexuous, scaberulous, pale yellow. Palea slightly shorter than the lemma and much narrower but of the same consistency and indument, apex acute or tapering into a short acute point. Anthers oblong, pale-violet. Stigmas blackish. Caryopsis 4-4·75 x 1·5-1·75 mm., oblong, glabrous, light brown. |
| Notes: | |
| Derivation of specific name: | punctata: marked with dots or translucent glands |
| Habitat: | Growing in dense tussocks on stream banks, in swampy places, pools. Has recently become a serious weed of rice-cultivation in Zwaziland |
| Altitude range: (metres) | |
| Flowering time: | |
| Worldwide distribution: | Angola, Congo, Ghana, Ivory Coast, Madagascar, Nigeria, Sudan, Tanzania, Uganda, Zimbabwe |
| Zimbabwe distribution: | S |
| Growth form(s): | |
| Endemic status: | |
| Red data list status: | |
| Insects associated with this species: | |
| Spot characters: | Display spot characters for this species |
| Literature: |
Launert, E. (1971). Poaceae Flora Zambesiaca 10(1) Pages 32 - 34. (Includes a picture). Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 107. |
| Home | > | List of families | > | Poaceae | > | Oryza | > | punctata |