372 NATURAL ITISTOBY OF PLANTS. 



lateral adnate stipules. The flowers are axillary or terminal, sessile 

 or shortly pedicellate, solitary or collected into short spikes of cymes. 

 With a habit and leaves analogous to those of several plants of 

 the ji^cnera we have just studied, Coleogyne" has the characters of 

 Pot I'll nil a in the structure of its gynceceum and the direction of its 

 ovule; so that we may say that it is to the latter genus what 

 C/taniaha(ia, Piirshia, and Cercocarpus are to Geum. Its hermaphro- 

 dite flowers have a tubular receptacle lined by a glandular tissue 

 covered with hairs. On the rim of the tube is inserted a calyx of 

 five unequal imbricated leaves.^ The androceum consists of an inde- 

 finite number of stamens, whose filaments are inserted, not only on the 

 receptacular cup,^ but also on the sheath surrounding the gyna?ceum ; 

 the introrse two-celled anthers dehisce longitudinally. The unilocular 

 ovary is inserted, as in PursJda, in the bottom of the receptacle ; and 

 about half-way up its ventral angle^ arises a tortuous style, more or 

 less bent on itself near the base. Along the ventral edge of the 

 ovary and the whole length of the style, is a vertical groove ; the 

 edges of its stylar portion are thickened and everted, and covered 

 with stigmatic papilla?. Attached to the wall of the ovary, on a level 

 with the insertion of the style, is a descending, incompletely ana- 

 tropous ovule, whose micropyle looks upwards and outwards, so that 

 in the seed, which is as yet unknown, the radicle must be superior. 

 Around and above the ovary the disk is prolonged, nearly as in RJiodo- 

 Ijipus (p. 381), into a sort of sheath, whose finely laciniate or ciliate 

 mouth' gives passage to the upper part of the style. ^ The only 

 known species of this genus^ is a Californian shrub,^ possessing 

 little alternate simple appressed petiolate hairy leaves," with two 

 lateral adnate stipules. The flowers are solitary terminal, with a few 

 lobed imbricated bracts at the base. 



' ToRR., Tlant. Fremont., 8, t. iv. — B. H., as above stated towards the base of the outer 



Gen., 617, ii. 38. surface of the sheath. Its inner surface is co- 



* This calyx is the same as in PuritMa. When vered with long erect hairs. 



it has only four petals their prefloration is alter- * This also presents a longitudinal ventral 



n.itive-inibricate. groove, whose thickened everted lips bear stig- 



^ Towards its lower part, but still certainly inatic papilla?, 

 pcnjcynous. / c. ramosissima Tokh., loc. cil. — Waip., 



* The style is inserted here, and after first Ann., iv. 641. 



descending a little way in the bud, rises up and » " Frvtex liahHu Kraineriaj" (Tore.). The 



becomes vertical. The surface of the ovary is habit is also near that of PursTiia and some of 



somewhat uneven and tubcrculated, and above the smaller Amygdalea; such as Emplectocladns. 



the insertion of the style, as in Adenosloma. Here and there the branches end in spines. 



* The tissue of this opening is papillose, like a ^ Some of these are what are called Mai- 

 stigmatic surface. Several stamens are inserted pighiaceous. 



