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
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
Rhizome
Node with branching
Sheath and teeth
Cone
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