Home Flora of Missouri
Home
Name Search
Families
Volumes
Commelina L. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Species Plantarum 1: 40. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 8/26/2009)
Acceptance : Accepted
 

Export To PDF Export To Word

1. Commelina L. (dayflower)

Plants annual or perennial, the roots fibrous. Stems unbranched or more commonly branched. Leaf blades lanceolate to narrowly ovate, flat above the base. Inflorescences 1 to several, axillary, the flower clusters subtended by an ovate, strongly folded, spathelike bract that is shorter than the foliage leaves, and heart-shaped when unfolded. Flowers zygomorphic. Sepals 3, ovate, more or less equal in shape and size. Petals 3, the upper 2 larger, obovate to suborbicular, with an expanded portion abruptly narrowed to a stalklike base, the lower 1 somewhat to much smaller, oblong to broadly obovate, lacking a narrowed, stalklike portion. Stamens 3, 1 of which is incurved and has a longer anther than the other 2, the filaments glabrous. Staminodes 2 or 3, shorter than the fertile stamens. One hundred fifty to 200 species, nearly worldwide, but most diverse in tropical to subtropical regions.

 

Export To PDF Export To Word Export To SDD
Switch to indented key format
1 Margins of each spathelike bract free to the base (2)
+ Margins of each spathelike bract fused in the basal third (4)
2 (1) The lower, small petal white, the upper, larger petals blue; leaf sheaths mostly 1B2 cm long 2 Commelina communis
+ All 3 petals blue; leaf sheaths mostly 0.5B1.0 cm long (3)
3 (2) Lower edge (midrib) of the folded, spathelike bracts straight or nearly so; seed surfaces smooth or faintly irregularly dimpled 1 Commelina caroliniana
+ Lower edge (midrib) of the folded, spathelike bracts curved and noticeably arched; seed surfaces a strongly developed pattern of reticulate, polygonal ridges 3 Commelina diffusa
4 (1) The lower, small petal white, the upper, larger petals blue; leaf sheaths ciliate with white hairs and auricled at the tip 4 Commelina erecta
+ All 3 petals blue; leaf sheaths ciliate with reddish brown hairs, the tip not auricled 5 Commelina virginica
 
 
© 2014 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110