liOSACEJE. 369 



but with a calycle ; the ovary and androceum ai*e identical, 

 the disk is covered with hairs, and the carpels are seated on a 

 central prominence of the receptacle. The leaves are irregularly 

 lobed or pinnatifid, and the flowers are borne on long slender 

 peduncles ; these are sometimes solitary, sometimes accompanied 

 by lateral younger flowers, also borne on long axes, on which we 

 find but a few scattered bracts. Thus the two genera Coicania and 

 ¥allugia are only separated by characters of very little value. ^ 



CJiamcebaticr may be considered as Geum or Coioania with a uni- 

 carpellary gynaeceum. The floral receptacle forms a pretty deep 

 cup, lined by a thin downy disk and covered externally with capitate 

 glandular hairs. On its rim are inserted five valvate sepals, and 

 five alternating petals, imbricated in the bud. The stamens are 

 indefinite, inserted within the perianth,^ with free filaments inflexed 

 in the bud, and introrse two-celled anthers. The flower is, then, 

 also nearly that of the Brambles ; but the gynseceum only consists of 

 one nearly central carpel. The unilocular ovary is swollen on one 

 side, and is traversed on the opposite side by a vertical groove,^ con- 

 tinued the whole length of the terminal style surmounting the 

 ovary. The thick edges of this groove are everted for nearly the 

 whole length of the style, and are covered with stigmatic tissue. 

 At the base of the ovary is a short placenta bearing a single erect 

 anatropous ovule, whose raphe looks towards the above-mentioned 

 groove, while the micropyle is inferior and dorsal as in Getim. The 

 fruit is an achene with a coriaceous pericarp, surrounded by the 

 receptacular sac. The seed is ascending, and attached by a broad 

 umbilicus ; it contains within its thick spongy coats a fleshy embryo, 

 with its radicle inferior, and surrounded by a thin layer of albumen. 

 The only known species of this genus' is a little shrub with odo- 

 riferous organs covered with glandular hairs. The leaves are alter- 



^ And, were it not for the consistency of their ^ They are shorter and inserted lower down 



stems, no one would have dreamed of separating the receptacular cup as they are more in- 



them from Geum, towards which Dryas already ternal. 



afforded a passage, so to say, with its thick rhi- ' In the fresh llower I have seen that the 



zomc and its smaller and simpler leaves. It would lips of this groove are in contact but without 



be no more strange to recognise the species of any cohesion; so that they may be separated 



Cowania and Fallugm as belonging to the genus without any breach of tissue. 

 Oeum, than to consider Poteiidlla fruticosa and * C.foUolosa Hkntu., Joe. ct<.— HooK.. Boi. 



the aUied woody species as members o( Toten- Mag.,i. 5l7l. — Her., Ilortic. Frani;. (ISlU), 



tilla. t. ii. — Tore., Flant. Fremont., t. vi.- -'I'duu. & 



2 Benth., Plant. Hartweg., 308.— 15. H., i\u., a^. Wlfpl. Exped.,\VA(;l'»). 

 Gen., 017, n. 39. 



VOL. 1. H n 



