428 EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



Ovary 4-lobed, forming 4 achenia. LABIATJE, p. 447. 



Stamens 5. Flower regular. Leaves alternate. BORAGINACEJE, p. 448. 



Group 10. Ovary free, compound, or the carpels two or more and distinct : 

 the ovules usually several or numerous. Corolla regular ; the stamens 

 inserted upon its tube, as many as the lobes and alternate with them. 

 Seeds albuminous. 



* Ovary compound (of two or more united carpels). 

 Placentae 2, parietal (sometimes expanded). Embryo minute. 



Corolla not valvate in aestivation. 



Leaves lobed, mostly alternate Seeds few. HYDROPHYLLACE.S:, p. 449. 

 Leaves entire, opposite. Seeds indefinite. GENTIANACE^E, p. 454. 



Corolla valvate-induplicate in aestivation. Subord. MENYANTHIDE.S, p. 454. 

 Placentae in the axis : ovary 2 3-celled. 



Embryo large, bent or coiled, with little albumen. Seeds one or two in 

 each cell. CONVOLVULACE^E, p. 451. 



Embryo straight or arcuate, in copious albumen. 



Styles 2, distinct. Seeds indefinite. HYDROLEACEJE, p. 450. 



Styles united nearly or quite to the summit. 



Ovary 3-celled. Cor. convolute in aestivation. POLEMONIACEJE, p. 450. 

 Ovary 3-celled. Cor. imbricated in aestivation. DIAPENSIACE.S:, p. 450. 

 Ovary 2-celled. Corolla plaited or valvate in aestivation. 



SoLANACEjE, p. 453. 



* * Ovaries mostly two and distinct, at least in fruit. 



Anthers introrse : pollen granular. APOCYNACE.E, p. 455. 



Anthers extrorse : pollen in waxy masses. ASCLEPIADACEJE, p. 455. 



Group 11. Ovary free, two-celled, few-ovuled; the cells of the fruit one- 

 seeded. Corolla regular (sometimes nearly polypetalous or wanting) ; the 

 stamens (two) fewer than its lobes. Shrubs or trees. 



Seeds erect. Cor. imbricated or contorted in aestivation. JASMINACEJE, p. 456. 

 Seeds suspended. Corolla valvate in aestivation. OLEACE.E, p. 457. 



803. Ord, CapriMiaceSB (the Honeysuckle Family). Mostly shrubs, 

 often twining, with opposite leaves, and no stipules. Calyx-tube 

 adnate to the 2-5-celled ovary; the limb 4-5-cleft. Corolla 

 regular or irregular. Stamens inserted on the corolla, as many as 

 the petals of which it is composed, and alternate with them, or 

 rarely one fewer. Fruit mostly a berry or drupe. Seeds pendu- 

 lous, albuminous. Ex. The Honeysuckles (Lonicera), which 

 have usually a peculiar bilabiate corolla (470, Fig. 743), the 

 Snowberry (Symphoricarpus), Diervilla, which has a capsular 

 fruit, &c., compose the tribe LONICERE^:, characterized by their 

 tubular flowers and filiform style : while the Elder (Sambucus) 

 arid Viburnum, which have a rotate or urn-shaped corolla, form 

 the tribe SAMBUCEJE. These plants chiefly belong to temperate 



