70 MEDICAL BOTANY. 



less united by their styles. Calyx free. Petals as many as sepals, or rarely 

 wanting. Stamens as many or twice as many as sepals, distinct. Flowers 

 often diclinous or polygamous. 



Order 30. — Anacardiace^e. — Fruit apocarpous. Ovule single, suspended 

 by a cord rising from the base of the carpel. 



Order 31. — Rutace^e. — Fruit finally apocarpous, few-seeded, with the 

 pericarp separating into two layers. Flowers bisexual. 



Order 32. — Xanthoxylace^:. — Fruit finally apocarpous, few-seeded, with 

 the pericarp separating into two layers. Flowers bisexual or diclinous. 



Order 33. — Simarubace;E. — Fruit finally apocarpous, one-seeded, with 

 the pericarp not laminated, and a small dry torus. Exalbuminous. Leaves 

 alternate, exstipulate. 



Order 34. — Zygophyllacejs. — Fruit finally apocarpous, few-seeded ; pe- 

 ricarp not laminated, and a small dry torus. Albuminous. Leaves oppo- 

 site, stipulate. 



Group XIII. — Geraniales. 



Ovary compound, or of several carpels adhering to a central axis. Calyx 

 free, usually imbricated. Stamens definite, usually monadelphous at base. 

 Flowers regular or irregular. 



Order 35. — Linaceje. — Flowers symmetrical. Styles distinct. Carpels 

 longer than the torus. Seeds with little or no albumen. 



Order 36. — Oxalidace^e. — Flowers symmetrical. Styles distinct. Car- 

 pels longer than the torus. Seeds with albumen. 



Order 37. — Geraniace^e. — Flowers usually symmetrical. Styles and 

 carpels combined round a long-beaked torus. 



Group XIV. — Sapindales. 



Ovary compound, 2-3-lobed, 2-3-celled, with the placentae axile. Calyx 

 free, imbricated. Stamens definite. Petals irregular. Albumen wanting, or 

 in small quantity. 



Order 38. — Sapindace^e. — Flowers complete, unsymmetrical. Petals 

 usually with an appendage, or 0. Anthers opening longitudinally. Carpels 

 3. Seeds wingless, arillate. 



Order 39. — Erythroxylaceje. — Flowers complete, partially symmetrical. 

 Calyx imbricated. Petals with an appendage. Ovules sessile, pendulous. 

 Stigmas capitate. Embryo straight. 



Group XV. — Rhamnales. 



Ovary compound ; 2-6-celled. Calyx free or adherent to base of ovary. 

 Petals and stamens equal to lobes of calyx, and opposite to each other, or 

 alternate. 



Order 40. — Rhamnace,e. — Flowers polypetalous. Calyx valvate. Seeds 

 erect. 



Order 41. — Celastrace.e. — Flowers -polypetalous. Calyx imbricated. 

 Stamens five, distinct. 



Order 42. — Vitace^e. — Flowers regular, symmetrical. Placentae axile. 

 Anthers opening longitudinally. 



