14b ANALYTICAL KEY. 



DIVISION 2. GAMOPETAL^. 



A. Ovary Inferior (adherent to the calyx) or largely so. 



Stamens more numerous than the lobes of the corolla, 8 or IjO. 



Distinct and free from it, or nearly so Ericaceae, 68 



Stamens as many as the lobes of the corolla (5, rarely 4), united into a tube. 



Flowers in an involucrate head, resembling a single blossom Compositce, 66 



Flowers separate in racemes or spikes; ovary slender Lobeliaceae, 67 



Stamens as many as the corolla-lobes, distinct. 



Nearly or quite free; leaves alternate, no stipules Campanulaceae, 67 



Inserted on the corolla; leaves opposite or whorled. 



With stipules, or in whorls, entire Rubiaceae, 65 



Without stipules, opposite. Calyx with minute lobes. . . Caprifoliaceae, 64 



Prostrate herbs. Ahronia in Nyctaginaceee, 104 



StEunens only 3, fewer than the lobes of the corolla. 



Leaves opposite; stamens distinct; flowers minute Valerianaceae, 66 



Leaves alternate; stamens united; fruit prickly Cucurbitaceae, 63 



B. Ovary Superior (free from the calyx) or nearly so. 

 1. FLOWERS REGULAR or nearly so. 



* Stamens, twice as many as the lobes of the corolla. 



Stamens 8-10, distinct; corolla campanulate or ovoid ^ Ericace^, 68 



Filaments united for half their length; corolla nearly polypetalous Styra^, 20 



Pistils or styles as many as the petals; fleshy herbs Crassulaceas, 58 



* * Stamens as many as the lobes of tJie corolla and opposite them. 



Styles 5; long-clawed petals, scarcely united Flumbaginaceae, 71 



Style 1 ; corolla lobes, reflexed or rotate Primulaceas, 72 



* * * Stamens as many as the lobes of the corolla and alter uate ivifh them. 



Style and stigma one, leaves entire (lobed in the first). 



Leaves mostly radical; flowers on a scape Romanzofia in Hydrophyllaceae, 80 



Leaves all radical; flowers in a spike; 4-lobed corolla scarious PJantaginaceae, 103 



Leaves alternate; flowers mostly in coiled spikes; ovary 4-lobed Borraginaceae, 83 



Leaves alternate; flowers rotate to funnelform; ovary 2-celled Solanaceae, 88 



Leaves opposite; flowers in cymes; ovaries 2 ApocynaceaB, 73 



Leaves opposite or whorled; flowers in umbels; ovaries 2 Asclepiadace^e, 73 



Style 1 or none, stigmas 2. 



Leaves opposite or whorled, sessile, entire, or ) _ 



T ; ofi-i • . i Geutianacess, ,4 



Leaves alternate, 3-ioliolate, on a creeping rootstock ) 



