XXii SYNOPSIS OF GENERA. 



Class XL Dodecandria. Stamens 12 — 20. 

 Order I. Monogynia. Pistil 1. 

 Lythrum. Pet. 6. Cat. 12-cleft, inferior. Salicaricc, p. 70. 



Order II. Digynia. Pistils 2. 



Agrimonia. Pet. 5, borne by the calyx. Seeds in the bottom of the 

 hardened calyx. Rosacea, p. 95. 



Order III. Trigynia. Pistils 3. 



Reseda. Pet. in many segments. Caps, of 1 cell, gaping. Resedacea, 

 p. 234. 



(See Euphorbia in CI. xxi.) 



(Tetragynia, 4 Styles. 

 See Tormentilla in CI. xii.) 



Order IV. Dodecagynia. Pistils 12. 



Sempervivum. Pet. 12. Cal. in 12 deep segments.} Caps. 12. CVrt* 1 - 

 sulacece, p. 62. 



Class XII. Icosandria. Stamens 20 or more, from the rim 

 of the calyx. 



Order I. Monogynia. Pistil 1. 



Prunus. Cal. inferior, 5-cleft. Pet. 5. Nut of the drupe with slightly 

 prominent seams. Rosacea, p. 80. 



(See Crataegus in Ord. Pentagynia.) 

 Order II. Pentagynia. Pistils 2 — 5. 



Crataegus. Pomaceee. See p. 107. 



Pyrus. Cal. superior, 5-cleft. Pet. 5. Apple with 2 — 5 membranous 

 2-valved capsules. Seeds 2. Pomaceee, p. 107. 



Spiraea. Ca/. inferior, 5-cleft. Pet. 5. Caps, of 2 membranous valves, 

 i'eerfs numerous. Rosaceee, p. 86. 



Order III. Polygynia. Pistils numerous. 



Rosa. Cal. 5-cleft; tube finally pulpy, lined with hairs, and with nu- 

 merous bristly seeds. Rosacea, p. 95. 



Rubtjs. Cal. 5-cleft. Berry superior, compound, deciduous. Recept. 

 spongy, permanent. Rosacea, p. 80. 



Tormentilla. Cal. 8-cleft. Pet. 4. Seeds naked, beardless. Recept. 

 dry, obsolete, Rosaceee, p. 93. 



Dryas- Cal. 8- or 10-cleft. Pet. 5 or 8. Seeds each with a feathery 

 tail. Rosacea;, p. 94. 



Geum. Cal. 10 cleft. Pet. 5. Seeds each with a bent hooked tail. 

 Recept. columnar. Rosacea, p. 04. 



Fragaria. Cat. 10-cleft. Seeds naked, even, on the surface of a mostly 

 pulpy, deciduous receptacle. Rosacea, p. 92. 



