LEG UMIN0S2E- GJES^ 1 1 1 'INI /.'. 7:. 



115 



Ct rcis Siliqua 



\ 



Fig. t)0. 



Sued (»). 



are fairly like those of Bauhinia, with an ohliquely turbinate recep- 

 tacle, lined by a glandular disk thickened at the rim. The calyx is 

 gamosepalous, bladder-shaped, and swollen anteriorly. It is divided 

 only at the top into five obtuse teeth, which 

 are imbricated in the very young bud. The 

 corolla consists of five petals, in form resem- 

 bling those of a papilionaceous corolla, but 

 so arranged in bud that the posterior and 

 smallest petal is inside the two lateral petals, 

 which are themselves overlapped by the 

 outer pair. Each consists of an elongated 

 claw, and a limb which is subauriculate at 

 the base. The stamens are free, in two 

 whorls. Each consists of a declinate peri- 

 gynous filament, and an introrse two-celled 

 anther of longitudinal dehiscence. The 

 gyn^ceum, inserted near the bottom of the 

 receptacle,' though curving towards its ante- 

 rior wall in the expanded flower, consists of a 

 shortly stipitate ovary, containing anatropous 

 ovules 2 arranged in two rows down its pos- 

 terior wall, and a terminal bowed style, 

 whose stigmatiferous apex looks backwards. 

 The pod is narrow elongated and stipitate, 

 edged by a narrow rib down the placentary angle ; it dehisces at 

 first down the dorsal angle, and later (not constantly) down the 

 ventral. The shortly funiculate seeds contain within their coats a 

 coloured embryo, surrounded by thick subcorneous albumen. 3 This 

 genus consists of unarmed trees or shrubs from Europe, temperate 

 Asia, and North America. Three or four species are known. 4 The 



Fig. 89. 

 Fruit. 



Fig. 91. 



Longitudinal 

 section of seed. 



G^rtn., Fruct., ii. 303, t. 144. — Lamk., Diet., 

 ii. 585; Suppl., ii. 694; III., t. 32S.— DC, 

 Prodr., ii. 518. — Spach, Suit, a Bvffon, i. 124. 

 — End!., Gen., n. 6750. — B. H., Gen., 576, n. 

 334. — Siliquastrwm Gesn. — T., Instit., 616, t. 

 414. — Adans., Fam. des PI., ii. 317. 



1 In C. canadensis there is a far larger pro- 

 portion of the receptacular sac between the foot 

 of the gynseceum and the vexillary petal than 

 on the other side of it ; and, as in Bauhinia 

 and Griffonia, it is on the side of the ovary 

 directed towards this larger depression that 



the ovules are inserted. (See Adansonia, ix 

 223.) 



2 They have two coats, and the micropyle is 

 upwards and outwards. 



3 The ehalazal projection seen in figs. 90, 91, 

 is the result of an inconstant hypertrophy of the 

 external integument. 



4 Duham., Arbr., t. 1. — Sibtii., Fl. G, 



t. 367.— Hook., in Bot. Mag., t. 1198.— V. 

 Houtte, /•'/. des Serres, viii. t. 849.— A. Gray, 

 Unit. States F.vpt. Exped., Bui. ii. t. 3. — 

 W.\lp., Rep., i. 808. 



1 2 



