26 ANALYTICAL KEY. 



C. Stamens as many as the lobes of the corolla and alternate with them, or fewer, 



1. Ovary adherent to the calyx-tube {inferior). 



Tendril-bearing herbs : anthers often united. . . Cucurbitace^e, 186 

 Tendrils none. 



Stamens united by their anthers into a ring or tube. 



Flowers in an involucrate head Composite, 215 



Flowers separate, not involucrate: corolla irregular. Lobeliaceje, 282 

 Stamens separate, free from the corolla or nearly so, as 



many as its lobes : stipules none : juice milky. Campanula ceje, 285 

 Stamens separate, inserted on the corolla. 



One to three, always fewer than lobes of the corolla. Valerianace^s, 213 

 Four or five : leaves opposite or whorled. 



Flowers in a dense head, with an involucre : no stipules. Dipsace.e, 215 

 Flowers if in heads not involucrate. 



Leaves whorled and without stipules. ) # Rubiace^e, 208 



Leaves opposite or whorled, and with stipules. > 

 Leaves opposite without stipules (but some- 

 times with appendages to the petioles imitat- 

 ing them). ....... CAPRIFOLIACEiE, 202 



2. Ovary free from the calyx {superior). 

 * Corolla irregular : stamens {with anthers) 4 and didynamous, or only 2. 

 Ovules and seeds solitary in the (1-4) cells. 



Ovary 4-lobed, the style rising from between the lobes. Labiatje, 341 



Ovary not lobed, the style from its apex. . . . Verbenace^e, 339 

 Ovules numerous or at least as many as 2 in each cell. 

 Ovary and pod 1 -celled, 



With a free central placenta : stamens 2 Lentibulace.<e, 317 



With 2 or more parietal very many-seeded placentas : 



stamens 4. Orobanchace^e, 322 



Ovary and fruit more or less 4 - 5-celled. Martvnia, ) -r t ^ xt ^ xtt , ^ „ „,n 



J - > XSIGNONIACE^;, oJu 



Ovary and pod 2-celled, but the 2 placentas parietal. ) 

 Ovary and pod 2-celled : placentas in the axis. 



Seeds rarely few, not on hooks, with albumen. Scrophulariace^k, 324 



Seeds few, borne on hook-like or other projections 



of the placenta? : no albumen. . . . Acanthace^:, 338 



* * Corolla somewhat irregular : stamens {ivith anthers) 5. 



Stamens free from the corolla : anthers with their cells 



opening by a hole or chink at the top. Azalea, in Ericace^;, 286 

 Stamens inserted on the corolla. 



Ovary deeply 4-!obed around the stvlc. Echium, in Borraginaceje, 350 



Ovary not lobed : pod many-seeded. 



Filaments or some of them woolly. Verbascum, Scrophulariace^e, 324 

 Filaments not woolly Hyoscyamus, Solanacea:, 3SO 



