<2 132 Structural and Physiological Botany. 
known as the Zegwle, (Fig. 251) and forming together the fs 
va 
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"Py ae ¥ 
a . > , 
0h 
PE 
» Sao See 
ve 
a i> aly | ee 
Leguminosze, consists of five petals, of which one, the stan- 4 
dard or vexillum, the uppermost, 1s usually the largest; at — 
its sides are the two wengs or ale; while the lowermost 
Fic. 253.—-Papilionaceous corolla of laburnum: I. seen laterally; II. in front ;: 
III. standard; IV. keel; V. left wing seen from without. 
part of the corolla, the ee? or carina, consists of two petals - 
often more or less united above, and usually enclosing the — 
stamens and pistil. ‘The caryophyllaceous corolla (Figs. 254, 
255) consists of five petals with long ungues attached to the 
Fic. 2%4.—Caryophyllaceous Fic. 255.—Longitudinal section through the 
corolla of Lychuis vespert- caryophyllaceous corolla of Dzanthus(mag- — 
a,with corona (magnified). nified). i 
base of a gamosepalous [or sometimes aposepalous| calyx, 
[and each of the petals is often furnished with an appendage — 
- 
