PEA 



27 



widen out so that the calyx, petals, and stamens spring from the 

 margin of a flat plate, while the carpel is attached in the centre. 

 The calyx is large and green. It consists of five sepals joined 

 together in the lower third. One of the five sepals stands in the 

 middle line in front. Within the calyx come the five petals, 

 alternating in position with the sepals and forming the corolla. 



FIG. 8. Flower of the Garden Pea. i, Seen from the side, one wing removed ; 

 2, inner view of wing ; 3, standard looked at from in front ; 4, the keel 

 looked at from above ; 5, the keel, with the wings seen from above ; 6, outer 

 view of the basal part of one wing ; 7, the stamens and pistil seen from the 

 side ; 8, front end of style seen from above ; 9, a single stamen, a, Swell- 

 ing near front end of keel ; , swelling of the ridge of the keel ; c', bulge 

 on wing which fits into the depression in the keel (c) ; d\ bulge in wing 

 which fits into the depression in the keel (d], and is overlaid by the ridge 

 on the standard (d"} ; e, lobe at base of keel ; e', backwardly projecting lobe 

 of the wing ; /, portion of wing which is held in place by the median swell- 

 ing on the standard (/') ; /, tip of keel ; 0, opening by which the style 

 protrudes ; j/, stigma. (From Miiller's Befruchtung der Blumen.} 



One large petal, called the standard, is situated at the back of the 

 flower and overlaps with its edges the other petals. Then come 

 two lateral petals called the wings, and within these again two 

 petals partially fused together and forming what is known as the 



