548 EMPETRACE.E.- CROW-BERRY TRIBE. 



2. ASARUM (Asarabacca). Perianth bell-shaped, 3- 

 cleft ; stamens 12 inserted at the base of the style ; 

 stigma 6-lobed; capsule 6-celled. (Name from the 

 Greek a, not, and seira, a wreath, denoting that the plant 

 was by the ancients excluded from garlands.) 



1. ARISTOLOCHIA (Birthwort). 



1. A. Clematitis (Birthwort). The only species found 

 growing in wild situations in Britain, but not considered 

 indigenous. Woods, and among ruins in the east and 

 south of England, rare. A singular plant, with creeping 

 roots, slender, unbranched, erect stems, and large heart- 

 shaped leaves ; the flowers, which grow several together, 

 are of a dull yellow colour, swollen at the base, con- 

 tracted above, and expanding into an oblong lip with 

 a short point. Fl. July, August. Perennial. 



2. ASARUM (Asarabacca). 



1. A. Europceum (Asarabacca). The only species 

 found in Britain, and not considered indigenous. 

 Woods in the North, rare. A curious plant, consisting 

 of a very short stem, bearing two large shining learns, 

 and a solitary dull-green drooping flower. Fl. May. 

 Perennial. 



ORD. LXXY.EMPETEACE^. CROW-BERRY 

 TRIBE. 



Stamens and pistils on separate plants ; perianth of 

 several scales arranged in 2 rows, the inner resembling 

 petals ; stamens equal in number to the inner scales, and 

 alternate with them ; ovary of 3, 6, or 9 cells, on a 

 fleshy disk ; style 1 ; stigma rayed ; fruit fleshy, with 

 long cells ; seeds 1 in each cell. Small heath-like ever- 

 green shrubs, with minute axillary flowers, chiefly in- 

 habiting Europe and North America. The leaves and 

 fruit are slightly acid. The berries of the Crow-berry 



