14b 



ANALYTICAL KEY. 



DIVISION 2. GAMOPETAL^. 



A. Ovary Inferior (adherent to the calj-x) or largely so. 



Stamens more numerous than the lobes of the corolla, 8 or 10. 



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 Compositae, 66 



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



Stamens as manj' 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. . . Caprifoliaceas, 64 



Prostrate herbs. Ahronia in Nyctaginace^, 104 



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



Leaves opposite; stamens distinct; flowers minute Valerianaceee, G6 



Leaves alternate; stamens united; fruit prickly CucurbitaceEB, 63 



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

 1. PLO'WERS REGULAR or nearly so. 



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



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



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



Pistils or styles as many as the petals; fleshy herbs Crassulaceas, C8 



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



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



Style 1; corolla lobes, reflexed or rotate , : Primulaceee, 72 



* * * Starmns as many as the lobes of the corolla and alternate with them. 



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



Leaves mostly radical; flowers on a scape Romanzoffia in Hydrophyllaceas, 80 



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



Leaves alternate; flowers mostly in coiled spikes; ovary 4-lobed Borraginaceae, S3 



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



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



Leaves opposite or whorled; flowers in umbels; ovaries 2 . . . . ... . Asclepiada'ceae, 73 



Style 1 or none, stigmas 2. 



Leaves opposite or wheeled, sessile, entire, or ) 



Leaves alternate, 3-foliolate, on a creeping rootstock j ' ' 



