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Published In: Species Plantarum 2: 1040. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)


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Shrubby dioecious, rarely monoecious plants with an erect to decumbent straggling or a scandent habit. Leaves reduced. Male strobili 2‑4 or clustered at the nodes; anther dehiscence porose. Female strobili 2‑4 per node; each strobilus with several pairs of bracts. Ovule(‑s) terminal, inner integument terminating in an exserted tube (tubillus). Sees 1‑2.

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1 Plants not scandent. Leaves much reduced or scale like. (2)
+ Scandent plants with linear leaves 0.8 2 3 cm long. Ephedra ciliata
2 (1) Tubillus straight. (3)
+ Tubillus not straight. (7)
3 (2) Plants more than 15 cm tall. (4)
+ Plants small, up to 10 cm tall. Ephedra regeliana
4 (3) Tubillus up to 1.0 mm long. (5)
+ Tubillus more than 1.5 mm long. (6)
5 (4) Branches ascending, green. Bracts of female strobili not winged. Ephedra gerardiana
+ Branches spreading, yellowish green. Bracts of female strobili broadly winged, erose.
6 (4) Branches thick, striate; bracts 3 pairs. Seeds several. Ephedra sarcocarpa
+ Branches slender, smooth striate; strobili solitary, bracts 4 pairs, connate. Fruit ovoid, sub globose. Seed 1. Ephedra procera
7 (2) Stem scabrid,transversely rugulose.Seedslessthan 4 mm long. Ephedra pachyclada
+ Stem striate verrucose. Seed 4 mm or more long. (8)
8 (7) Fruit 2-3 seeded. Seed 6 mm long. Ephedra intermedia
+ Fruit 1 seeded. Seed 4 mm long. Ephedra monosperma
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