ANALYTICAL KEY. 23 



Anthers not opening by pores. 



Stamens on a flat disk which covers the ovary. CELASTRACE^E, 109 

 Stamens inserted on the calyx. 



Eight or four (rarely five) ; style 1. . . ONAGRACEJE, 186 

 Tive or ten ; styles 2 - 3, distinct. . . SAXIFRAGACE^:, 168 

 Ovules and seeds only one in each cell. 



Stamens 10 or 5 (instead of many), rarely in Crataegus, in ROSACES, 165 

 Stamens 2 or 8 ; style 1 ; stigma 2 - 4-lobed ; herbs. ONAGRACE^E, 186 

 Stamens 4 or 8; aquatics ; styles or sessile stigmas 4. HALORAGE.E, 180 

 Perfect stamens 4 ; styles 2; shrub. . . HAMAMELIDE^E, 179 



Stamens 4; style and stigma 1 ; chiefly shrubs. . . CORNACE^:, 213 

 Stamens 5 ; flowers in umbels, or rarely in heads. 



Fruit dry, splitting in two at maturity; styles 2. UMBELLIFER^E, 198 

 Fruit berry-like ; styles 2-5, separate or united. ARALIACE^E, 212 



DIVISION II. GAMOPETALOUS calyx and corolla both present ; 

 the latter with its petals united more or less into one piece. 



A. Stamens more numerous than the lobes of the corolla. 



Ovary 1-celled with one parietal placenta. . . . LEGUMINOS^E, 122 

 Ovary 1-celled with two parietal placentae. Adlumia, &c., in FUMARIACEJS, GO 

 Ovary 1-celled with the ovules at the centre or base. . STYRACACE^E, 333 

 Ovary 2-celled with a single ovule in each cell. . . POLYGALACE^E, 120 

 Ovary 3 - many-celled. 



Stamens free or nearly free from the corolla ; style single. ERICACEAE, 309 

 Stamens free from the corolla ; styles 5. Oxalis, in GERANIACE.E, 105 



Stamens inserted on the base or tube of the corolla. 

 Filaments monadelphous ; anthers 1-celled, kidney-shaped. MALVACEAE, 96 

 Filaments 1 5-adelphous at base; anthers 2-celled. 



Calyx free from the ovary TERXSTROSMIACE^E, 95 



Calyx coherent with the ovary or with its base. STYRACACE^:, 333 

 Filaments wholly distinct ; calyx free, persistent. EBENACE^B, 333 



Filaments in pairs at each sinus; anthers 1-celled. CAPRIFOLIACE.E, 216 



J3. Stamens (fertile ones) as many as the lobes of the corolla and opposite them. 



Ovary 5-celled ; corolla appendaged with scales inside. SAPOTACE^E, 332 



Ovary 1-celled; pod several - many-seeded ; style 1. PRIMULACE^E, 328 



Ovary 1-celled ; utricle 1-seeded ; styles 5. . . PLUMBAGINACEJE, 327 



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



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



Tendril-bearing herbs ; anthers often united. . . CUCURBITACE.E, 194 

 Tendrils none. 



Stamens united by their anthers into a ring or tube. 

 Flowers in an involucrate head. .... COMPOSITE, 230 

 Flowers separate, not involucrate ; corolla irregular. LOBELIACE^E, 305 

 Stamens sepr.rate, free from the corolla or nearly so, as 



many as its lobes : stipules none : juice milky. CAMPANULACE^E, 307 



