LESSON, 20.} 



ITS KINDS. 



131 



Samara, or Rey-frilil, is either a nut or an achenium, or any 

 oilier indehiscent fruit, furnished with a wing, like that of the Maple 

 (Fig. 1), Ash (Fig. 300), and Elm (Fig. 301). 



354. The Capsnlt!, or Pod, is the general name for dry seed-vessels 

 which split or burst open at maturity. 

 But several sorts of poti are distin- 

 guished by particular names. Two of 

 them belong to simple pistils, namely, 

 the Follicle and the Legume. 



355. The Follicle is a fruit of a simple 

 pistil opening along the inner suture 

 (307). The pods of thePieony, Col- 

 umbine, Larkspur, Marsh -Marigold 

 (Fig. 302), an.d Milkweed are of this 

 kind. The seam along which 

 the follicle opens answers to 

 the edges of the pistil-leaf 

 (Fig. 251, 253). 



356. The legume or true 

 Pod, Ilka the Pea-pod (Fig. 

 303), is similar to the follicle, only it opens by the outer as well as 

 the inner or ventral suture (307), that is, by what answers to the 

 midrib as well as by what answers to the united margins of the leaf. 

 It splits therefore into two pieces, which are called valves. The le- 

 gume belongs to plants of the Pulse family, which are accordingly 

 termed Legumtnos<B, that is, leguminous plants. So the fruits of this 

 family keep the name of legume, whatever their form, and whether 

 they open or not. A legume divided across into one-seeded joints, 

 which separate when ripe, as in Tick-Trefoil (Fig. 304), is named a 

 Lament. 



357. The trnc Capsule is the pod of a compound pistil. Like the 

 ovary it resulted from, it may be one-celled, or it may have as many 

 cells as there are carpels in its composition. It may discharge its 

 seeds through chinks or pores, as in the Poppy, or burst irregularly 

 in some part, as in Lobelia and the Snapdragon ; but commonly it 

 splits open (or is dehiscent) lengthwise into regular pieces, called 

 valves. 



Fla. 3!)0. Samnrior key of the White Ash. 301. Samara of the American Elm, 



FIG. 332. Fi.liitle ol' Mar.h-JIarigDlil (Callha pahistris). 



FIG, 303. Lcgiiino of a Swe^t Pea, opened. 



FIG. 304. Luiuem or juiuled lc£iimo cf Tlck-Trefuil .f Ueimiu<7IumJ, 



