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FNA | Family List | FNA Vol. 3 | Urticaceae

3. Laportea Gaudichaud Beaupré, Voy. Uranie, Bot. 12: 498. 1830.

[For F.L. de Laporte de Castelnau, leader of expeditions to South America]

Urticastrum Heister ex Fabricius

Herbs , annual or perennial, with stinging and nonstinging hairs on same plant. Stems simple, erect. Leaves alternate; stipules present. Leaf blades narrowly ovate to orbiculate, margins dentate or serrate; cystoliths rounded. Inflorescences axillary and terminal, of paniculately arranged cymes. Flowers unisexual, proximal panicles staminate and distal pistillate, or staminate and pistillate flowers in same panicle; bracts absent. Staminate flowers: tepals 4-5, distinct, equal; stamens 4-5; pistillode knoblike. Pistillate flowers: tepals 2-4, distinct, outer pair minute or absent, without hooked hairs; staminodes absent; style persistent even in fruit, hooklike or elongate; stigma extended along style. Achenes stipitate, laterally compressed, ±orbicular, free from and not enclosed by perianth. x =13.

Species 22 (2 in the flora): North America, West Indies, Central America, South America, Asia, Africa, Pacific Islands.

Most species of Laportea occur in Africa and Madagascar.


Chew, W.L. 1969. A monograph of Laportea (Urticaceae). Gard. Bull. Straits Settlem. 25: 111-178.

1 Plants with stinging hairs and stipitate-glandular hairs; base of leaf blade rounded or abruptly attenuate, auriculate; achenes less than 1.5mm.   1 Laportea aestuans
+ Plants with stinging hairs but without stipitate-glandular hairs; base of leaf blade rounded, truncate, or broadly cuneate, not auriculate; achenes 2mm or more.   2 Laportea canadensis

Lower Taxa


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