Text-book of structural and physiological botany . 251); tinguiciilate(Figs. 250-252), when the petals are very narrow in thelower part, which forms a claw or imguis, while comparativelybroad in the upper part or lamma, &c. There are several forms of the apopetalous corolla whichare of especially common occurrence, and therefore worthyof note [and which are frequently characteristic of largenatural groups] : viz. the cruciform, papilionaceous, caryo-phyllaceous, rosaceous, and the less common but very re-markable mitraeform. In the f;7/a/^r;;^ corolla (Fig. 252),characteristic of the large nat
Text-book of structural and physiological botany . 251); tinguiciilate(Figs. 250-252), when the petals are very narrow in thelower part, which forms a claw or imguis, while comparativelybroad in the upper part or lamma, &c. There are several forms of the apopetalous corolla whichare of especially common occurrence, and therefore worthyof note [and which are frequently characteristic of largenatural groups] : viz. the cruciform, papilionaceous, caryo-phyllaceous, rosaceous, and the less common but very re-markable mitraeform. In the f;7/a/^r;;^ corolla (Fig. 252),characteristic of the large natural order of Cruciferae, we findfour unguiculate petals arranged in the form of a cross, andalternating with the four sepals. The papilionaceous corolla(Fig. 253), confined to the division Papilionaceae of the order K 2 132 Structural and Physiological Botany. Leguminosae, consists of five petals, of which one, the stan-dard or vexillum^ the uppermost, is usually the largest; atits sides are the two wings or alee \ while the lowermostI.
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