Tropicos | Name - Ephedra L.

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Ephedra L.

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Published In: Species Plantarum 2: 1040. 1753. (1 May 1753) (Sp. Pl.)

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 spreading, yellowish green. Bracts of female strobili broadly winged, erose.
+	Branches ascending, green. Bracts of female strobili not winged.	Ephedra gerardiana

6 (4)	Branches slender, smooth striate; strobili solitary, bracts 4 pairs, connate. Fruit ovoid, sub globose. Seed 1.	Ephedra procera
+	Branches thick, striate; bracts 3 pairs. Seeds several.	Ephedra sarcocarpa

7 (2)	Stem striate verrucose. Seed 4 mm or more long.	(8)
+	Stem scabrid,transversely rugulose.Seedslessthan 4 mm long.	Ephedra pachyclada

8 (7)	Fruit 2-3 seeded. Seed 6 mm long.	Ephedra intermedia
+	Fruit 1 seeded. Seed 4 mm long.	Ephedra monosperma