4 GROUPS AND ORDERS. 



GtLom 11. Oraiy compound, 3-ccUcd. Sepals and petals Tcry irregular. Stamens monaddphous, the tube of filaments 

 split on one side ; anthers opening by a terminal pore. Seeds albuminous. 



36. PoLTGAl^CEX. Character the same as that of the group. 



Group 12. Ovary simple and solitary. Corolla papilionaceous or irregular, sometimes regtilar. Fruit a legume. Seeds 

 destitute of albumen. 



37. LEGCMiNosi : Suborder Papilionacea. CoroIU papilionaceous, rarely ahnost regular ; the sstivation imbricated. 



Stamens inserted with the petals on the base of the calyx. 



Group 13. Ovaries one or several, simple and distinct, or combined into a compound ovary, with two or more cells, and 

 the placenta: in the aiis. Flowers regular. Petals and (distinct) stamens inserted on the calyx. Albumen 

 none. 



38. Ros-^CEX. Calyx (except in the suborder P(?nia«<z) free from the ovaries. Stamens usually numerous. Ovaries 



with soUtary or few o\-ulcs. Styles distinct. Leaves alternate, usually with conspicuous stipules, 

 which very often adhere to the petiole. 



39. MELASTOsiACza:. Calyx adhering to the angles of the ovary. Stamens 8 - 12. Anthers elongated, mostly 



appcndaged and opening by pores ; in Estivation, indexed, and contained in tubular spaces formed 

 by the adhesion of the ovary with the nerves of the calyx. Leaves opposite, ribbed, not dotted. 



40. LTTHRACEi. Calyx tubular, enclosing the 2 - 4-celled ovary, but free from it. Stamens definite ; anthers 



opening longitudinally. Styles united into one. Capsule membranaceous, the dissepimenU often 

 obliterated. 



41. OsAGBAclLa:. Calyx-tube adherent to the (usually 4-ceUcd) ovary. Petals mostly 4, with as many or twice as 



many stamens. Styles united ; stigmas 4 or united. 



Group 14. Ovary compound, one-celled, with parietal placenta. Petals and stamens inserted in the throat of the calyx. 

 Flowers perfect. Calyx adherent to the ovary. 



42. CACTACEi. Sepals and petals numerous, confounded. Fruit baccate. — Succulent and usually leafless plants. 



43. GBOssuLACEi;. Calyx-lobes, petals and stamens 5.— Shrubs, mostly spiny or prickly. Leaves palmately lobed. 



Group 15. Ovary compound, with the calyx adherent. Fruit a pepo. Corolla usually monopctalons. Stamens di- 

 triadelphous ; anthers long, sinuous. 



44. CnctTBBiTACEis. Character same as that of the group. 



Grottp 16. Ovaries 2 or more, many-ovuled, distinct or more or less united. Calyx free from the ovary, or the tube 

 partly (rarely wholly) adherent to the ovary. Petals and stamens (mostly definite) inserted on the calyx. 

 Seeds numerous, albuminous. 



45. CaAssuLACEi;. Calyx free. Ovaries always as many as the sepals, distinct, or rarely partly united, follicular 



in fruit 



46. SAxiTBAGACEa:. Calyi oftcn partly adherent. Ovaries mostly 3, usually united below, distinct at the summit 



Grottp 17. Ovary compound, 2- (rarely 3-5-) celled, with a single ovule suspended from the summit of each cell. 

 Stamens (with one exception) as many as the petals and lobes of the adherent calyx. 



47. Haham£lace£. Summit of the ovary free. Capsule locuUcidal. — Shrubs with alternate stipulate leaves. 



48. UMBEiiiTEiLS. Styles 2. Carpels 2, separating at maturity. Albumen homy.— Herbs, with the inflorescence 



in umbels. 



49. Araiiace^:. Styles 3 to 15 (rarely 2). Carpels mostly baccate, not separable. Albumen fleshy.— Herbs with 



the inflorescence in umbels. 



50. CoRNACti. Flowers tetramerous. Styles united into one. Fruit a 3-celled drupe.— Trees or shrubs with 



opposite leaves. Flowers in cymes. 



