PlantNET Home PlantNET Home | Search NSW Flora | Contact Us  
FloraOnline
Introduction
Plant Name Search
Index Search
Spatial Search
Identification Keys
Classification
Glossary
HerbLink (Type Images)
WeedAlert
Other PlantNET Sites
Other Data Sources
NEW SOUTH WALES FLORA ONLINE Printable Page

Genus Pratia Family Lobeliaceae

Description: Small perennial or annual herbs, prostrate, decumbent or rarely ascending and erect, much branched, often forming mats, rooting at nodes and with acrid milky sap.

Leaves alternate and often 2-ranked, margins entire or toothed, usually sessile or lower leaves petiolate.

Flowers solitary in axils of leaf-like bracts towards the end of branches at irregular intervals, flowers bisexual or unisexual and then plants dioecious. Calyx shortly tubular, 5-lobed. Corolla white to pale purple, 5-lobed, oblique, 2-lipped, tube split to the base on the upper side, the upper lip 2-lobed, the lower 3-lobed. Stamens fused to corolla at base; filaments usually free from each other for about half their length; 3 upper anthers slightly longer at the apex and curved down onto the 2 shorter lower ones with a terminal tuft of hairs and 1 or more bristles (the 2 anterior anthers each bear a bristle). Stigma 2-lobed, or emarginate and hairy, eventually protruding from the anther column. Ovary inferior, usually 2-locular; stigma 2-lobed.

Fruit globose or ovoid and crowned by the persistent calyx, indehiscent of tardily dehiscent, usually ± fleshy, summit of ovary between the calyx lobes nearly flat, seeds numerous and small.


Photo © ANBG

Distribution and occurrence: World: c. 30 species, temperate to tropical regions of Asia, Australia, South America, tropical Africa, Pac. Is. Australia: 13 species (?all probably endemic), all States.

Text by B. Wiecek
Taxon concept:

 Key to the species 
1Peduncles <5 mm long2
Peduncles >5 mm long4
2Leaves to 12 mm long; corolla to 5 mm long3
Leaves 10–30 mm long; corolla >5 mm long
                       Back to 1
Pratia concolor
3Leaves oblong to elliptic; 1–3 mm wide; inland speciesPratia darlingensis
Leaves ovate to spathulate or ± circular, 2.5–8 mm wide; tableland species.
                       Back to 2
Pratia sp. A sensu Harden (1992)
4Leaves usually obovate to spathulate, margins mostly entirePratia surrepens
Leaves not as above, margins ± toothed
                       Back to 1
5
5Leaves ovate to lanceolate to oblong-lanceolate, 10–30 mm long, glabrous6
Leaves ovate to ± circular, mostly <10 mm long, usually hairy or glabrescent
                       Back to 4
7
6Peduncles 10–70 mm long; calyx lobes with a small basal tooth on each side; leaves mostly petiolate, often purplish on lower surfacePratia purpurascens
Peduncles 3–13 mm long; calyx lobes without basal teeth; leaves sessile, green on lower surface
                       Back to 5
Pratia concolor
7Peduncles mostly <20 mm long; corolla 4–6 mm longPratia puberula
Peduncles >20 mm long, corolla usually 6–10 mm long
                       Back to 5
Pratia pedunculata

  Privacy | Copyright | Disclaimer | About PlantNET | Cite PlantNET