Equisetum diffusum D.Don

Family

Equisetaceae

Nomenclature

Equisetum diffusum D.Don, Prod. Fl. Nepalensis 19. 1825; Boonkerd & Pollawatn, Pterid. Thailand: 61. 2000.

Description

Stems to 6 m tall but usually much smaller, main stems with 6–10 grooves. Sheath 4–7 mm long, the teeth 2–4 mm long (to 13 mm immediately beneath cone); teeth narrowly triangular, almost black. Cones solitary, terminal on the stems, 2.5–6 cm long, peduncles to 3 cm long. Sporangiophores hexagonal, peltate, bearing several sporangia ; spores isosporous, mixed with the elators.

Distribution in Thailand

NORTHERN: Nan.

Distribution in Laos

Luang Phrabang.

Wider Distribution

India.

Ecology

Terrestrial.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread outside of Thailand and not under any known threat.

Voucher specimens - Thailand

Middleton et al. 5023, Nan, Doi Phu Kha (E).

Voucher specimens - Laos

Poilane 26136, Luang Phrabang, between B. Long Nai & M. Nguen (P).

Habit

Habit

Rhizome

Rhizome

Node with branching

Node with branching

Sheath and teeth

Sheath and teeth

Cone

Cone

Site hosted by the Royal Botanic Garden Edinburgh. Content managed by Stuart Lindsay, Gardens by the Bay, Singapore and David Middleton, Singapore Botanic Gardens. Last updated 16 November 2016.