ANALYTICAL KEY. 23 



Anthers not open in j;^ by pores. 



Stamens on a flat disk ■which covers the ovary. CKLASTnACE^TE, 109 

 Stamens inserted on the calyx. 



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

 Five or ten; styles 2-3, di.stiiu't. . . Saxifragace-k, 1G8 

 Ovules and seeds only one in each cell. 



Stamens 10 or .5 (instead of many), — rarely in Crataegus, in RosACEiE, 1G5 

 Stamens 2 or 8 ; style 1 ; stigma 2-4-lobed; herbs. OxAORACKyE, 186 

 Stamens 4 or 8 ; aquatics ; styles or sessile stigmas 4. Halorage^, 180 

 Perfect stamens 4 ; styles 2 ; shrub. . . IIamamelide^, 179 



Stamens 4 ; style and stigma I ; chiefly shrubs. . . Cornace^, 213 

 Stamens 5 ; flowers in umbels, ol- rarely in heads. 



Fruit dry, splitting in two at maturity; styles 2. Umbellifera!, 198 

 Fruit berry-like ; styles 2-5, separate or united. Araliace^e, 212 



Division IL GAMOPETALOUS calyx and corolla both present ; 

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



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



Ovary 1-celled with one parietal placenta. . , , Leguminosje, 122 

 Ovary 1-celled with two parietal placenta}. Adlumia, &c., in Fumariace^, 60 

 Ovary 1-celled with the ovules at the centre or base. . Styracace^e, 333 

 Ovary 2-celled Avitli a single ovTile in each cell. . . PoLYGALACEiE, 120 

 Ovary 3 - many-celled. 



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

 Stamens free from the corolla; styles 5. Oxalis, in Geraxiace^, 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 TfiRxsTRCEMiACEyE, 95 



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



Filaments wholly distinct ; calyx free, persistent. EBENACE.aE, 333 



Filaments in pairs at each sinus; anthers 1-celled. Caprifoliace.e, 216 



B. Stamens {fertile ones) as many as the lobes of the corolla and opposite them. 



Ovary 5-celled ; corolla appendaged with scales inside. SAPOXACEiE, 332 



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



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



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



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

 Tendril-bearing herbs ; anthers often united. ': . Cucurbitace^, 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. LoBELiACEiE, 305 

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



many as its lobes : stipules none : juice milky. CAMPAxuLACEiE, 307 



