2G ANALYTICAL KET. 



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



1. Ovary adherent tojhe cali/r-tuhe ( inferior) . 



Tendril-bearing herbs : anthers often united. . . Cucurbitace.t3, 186 

 Tendrils none. 



Stamens united by their anthers into a ring or tube. 



Flowers in an involucrate head Composit.e, 215 



Flowers separate, not involueratc: corolla irregular. Lobeliace.i;, 282 

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



many as its lobes : stipules none : juice milky. Campanulace.e, 285 

 Stamens separate, inserted on the corolla. 



One to three, always fewer than lobes of the corolla. Valerianace/t;, 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. J _ Rubiace^, 208 

 Leaves opposite or whorled, and with stipules. ) 

 Leaves opposite without stipules (but some- 

 times with appendages to the petioles imitat- 

 ing them) Capkifoliace^, 202 



2. Ovarij free from the calyx (supa-ior). 

 * 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. Labiat.e, .341 



Ovary not lobed, the style from its apex. . . . Vekbenace.i;, 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 : aquatics. Lentibulace.e, 317 

 With 2 or more parietal very many-seeded placentte : 



stamens 4 Oeobanciiace.e, 322 



Ovary and fruit more or less 4 - 5-cellcd. Martynia, / -n .,^^., , ^^ ^ gon 

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

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



Seeds rarely few, not on hooks, with albumen. SckophulariacExE, 324 

 Seeds few, borne on hook-like or other projections 



of the placentte : no albumen. . . . AcANXiiACEiE, 338 



* * Corolla someichat irregular : stamens [idth 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-lobed around the style. FA'hium, in Boeragixace.e, 350 



Ovary not lobed : ])od many-seeded. 



Filaments or some of them woolly. Verbascum, Scrophulariace.is, 324 

 Filaments not woolly Hyoscyamus, Solanace.k, 380 



