Equisetum diffusum D.Don
Equisetum diffusum D.Don, Prod. Fl. Nepalensis 19. 1825; Boonkerd & Pollawatn, Pterid. Thailand: 61. 2000.
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
Distribution in Laos
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).
Node with branching
Sheath and teeth
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