ANALYTICAL KEY. 



Ovary one : pod 2-lobed or 2-horned at the summit. Loganieae, 169 RCBIACEJS. 

 Ovary one, not divided nor deeply lobed, 



One-celled, simple : style and stigma 1, undivided. 88 (43) LEGUMINOS.E. 

 One-celled, compound : styles, stigmas, or parietal placenta? 2. 

 Leaves (or in Menyanthes 3 leaflets) entire. . . 341 GENTIANACE.E. 

 Leaves toothed, lobed or pinnately compound. ^ 

 Imperfectly 2-celled by two broad parietal pla- X26 (69) HYDROPHYLLACE.E. 



centse meeting each other. . . J 



Two- to ten-celled. 



Leafless and parasitic twining plants. Cuscuta, 332 CONVOLVULACE.E. 

 Plants with ordinary green leaves. 



Style none : corolla deeply 4 - 6-parted. . . 263 AQUIFOLIACE.E. 

 Style present. 



Stamens free from the corolla or nearly so. 245 (61) ERICACEAE. 



Stamens inserted on the corolla, 

 Four : corolla scarious : pod 2-celled, opening 



transversely, the top falling as a lid. 268 PLANTAGINACE^E. 

 Four: ovary 2-4-celled, with one ovule in each. 299 VERBENACE^:. 

 Five or rarely more. 



Leaves opposite, with stipules, or a transverse 



line in their place. Gelsemium, p. 296, and 169 LOGANIE.E. 

 Leaves mostly opposite, no stipules. 1 

 Leaves alternate : style 3-cleft at apex. 



^329 (70) POLEMONIACEJE. 



Leaves alternate and opposite : an- 



thers transversely 2-valved. 

 Leaves alternate : style undivided or rarely 2-cleft. 

 Ovules and seeds very numerous. 



Corolla imbricated in the bud. 281 SCROPHULARIACE.E. 



Corolla cither plaited, val vate, or twisted 



in the bud 338 (71) SOLAN ACE^B. 



Ovules and seeds 1 or 2 in each cell. 

 Style short : fruit splitting into two or 



four seed-like nutlets. . 319 (69) BORRAGINACE^B. 

 Style long : flowers showy : fruit a 



2 - 3-valved pod. . . 332 (70) CONVOLVDLACE^E. 



++ ** Stamens fewer than the lobes of the corolla. 

 Stamens 4, didynamous. 



Ovary 2-celled; the cells 2 -few-seeded. . . 296 (66) ACANTHACEJE. 

 Ovary 2 - 4-celled ; the cells 1-seeded. . . 298 (66) VERBENACE.B. 



Stamens 2, rarely 3 : ovary 2-celled. 



Low herbs : corolla scarious, withering on the pod. 268 PLANTAGINACEJK. 

 Herbs (rarely shrubs) : corolla rotate, or somewhat funnelform, 



slightly irregular, deciduous. Veronica, 281 (64) SCROPIIULARIACEJE, 

 Shrubs or trees. 



