672 ARBORETUxM AND FRUTICETUM. PART III. 



even. Young leaves with the edges rolled inwards. Flowers upon pedicels, 

 in groups resembling umbels, and produced before or after the leaves. 

 Ce'rasus Juss. Drupe globose, or with a hollow at its base; nut subglobose, 

 even, its covering fleshy, juicy, and with a surface glabrous, and not covered 

 with a grey bloom. Young leaves folded flatwise. Flowers upon pedicels, 

 either in groups resembling umbels, and produced before the leaves, or in 

 racemes terminal to the shoots, [)rotruded along with them. 



Sect. II. iS'piR.EE\« Dec. 



Sect. Char. Fruit of 5, or fewer, capsular carpels, which are distinct 

 from the calyx (which is persistent in .S'pirae'a, and, perhaps, in the other 

 genera), and, in most cases, from each other; each contains 1 — seeds. 

 {Lindley.) Style terminal. 



Pu'rsh/.4 Dec. Lobes of calyx obovate, obtuse. Petals and stamens 

 arising from the calyx. Stamens about 20. Carpels 1 — 2, ovate-oblong, 

 tapered into the short style, pubescent; each includes 1 ovule inserted 

 into its base, and opens by a longitudinal cleft. 



Ke'ra/.^ Dec. Lobes of calyx ovate, 3 obtuse, and 2 with a callous point. 

 Petals and stamens arising from the calyx. Stamens about 20. Carpels 

 3 — 8, distinct, glabrous, terminated by a slender style, globose ; each in- 

 cludes 1 ovule, which adheres to its side. 



5pir.e^a L. Petals and stamens arising from a torus, to which the calyx 

 adheres. Stamens 10 — 30. Carpels 1 to several, distinct; or, in a few 

 cases, connate at the base ; ending in short tips ; sessile, or, in u few cases, 

 stipitate ; each includes 2 — G seeds, affixed to the inner suture. 



Sect. III. Potenti'lle^e Jmw. (Synon. Dryadeae r«2/.) 



Sect. Char. Fruit an aggregation of carpels ; their integimients dry or 

 succulent; the carpels distinct from one another, and from the calyx, 

 which is persistent, and surrounds them, and, in many, is subtended 

 by as many bracteas as it has lobes; the bracteas alternate with the 

 lobes. Style proceeding from a little below the tip of the carpel. 

 Leaves, in most cases, pinnately divided. Stipules attached to the 

 petiole. 



7?u'bus L. Integuments of carpels juicy. 

 Potenti'lla Xcstl. Integuments of carpels dry. 



Sect. IV. Uo^s^.v. Dec. 



Sect. Char. Fruit a hip ; that is, with the tube of the calyx fleshy, of 

 a pitcher shape, contracted at the mouth ; and including an aggregation 

 of carpels attached to its inner face. Style proceeding from the inner 

 side of the carpel. 



/?o'sA Tourn. Leaf impari-pinnate. Stipules attached to the petiole. 



Prickles simple. 

 Lo^wEv^ Lindl. Leaf simple. Stipules none. Prickles usually compound. 



Sect. V. Po'me.e Lindl. 



Sect. Char. Fruit a pome ; that is, with the tube of the calyx become 

 very fleshy, and including, and connate with, the carpels. Carpels nor- 

 mally 3, with gristly or bony walls, including 1 — 2 seeds ; in Cydonia, 

 several. Habit, spiny or not; leaves, in most cases, undivided, in some 

 pinnate. Stipules not connate with the petiole. 



Crat.e'gus Lindl. Fruit ovate, not spreadingly open at the top. Carpels 

 1 — 3 prismatic nuts with bony shells, each including 1 seed. Spiny shrubs 

 or low trees. Leaves angled or toothed ; in most cases, deciduous. Flowers 

 in terminal corymbs. 



