28 ANALYTICAL KEY. 



B. Stamens having' anthers as many as eorolla-lobcs and opposite them. 

 Ovary 1-celled. 



Capsule cc-ovuled : style 1. PRiMULACEa:, 515 



Utricle 1-seeded: styles 5 or 1 with 5 stigmas. .... Plumbagine^, 510 



C. Stamens as many as corollorlobes, alternate with them, or fewer. 

 1 . Ovary adherent to calyx-tube, i.e., inferior. 

 Tendril bearers, anthers sometimes united. . . . . . Cucurbitaces, 323 • 



Tendrils 0. 

 Anthers syngenesious. 



Filaments separate : flowers axillary. Ecballium, 324 



Filaments separate : flowerets in involucred heads Compositje, 405 



Filaments more or less united : flowers scattered, bilabiate, . . Lobeliaceje, 501 

 Stamens separate. 



Free from corolla. Campanulace^e, 501 



Implanted on corolla. 

 Less in number than corolla-lobes. 



Corolla funnel-shaped. Valerianace^, 394 



Corolla bilabiate. . Morma, 399 



^-5, usually as many as corolla lobes. 



Flowers usually in an involucred head Dipsace^se, 399 



Flowers in cymes or panicles. 

 Leaves opposite, exstipulate and entire, or stipulate and 



pinnate Caprifoliace^, 378 



Leaves whorled, exstipulate, or opposite, stipulate. . . Rubiace^e, 379 



1 , Ovary free from calyx, i.e. superior. 

 * Corolla irregular .- stamens with anthers only 4 or 2. 

 Ovules 1 in each cell : cells 1-4. 



Ovary 1-celled : inflorescence globular Globularieje, 608 



Ovary 4-lobed. Aromatics with labiate flowers Labiate, 611 



Ovary 2-4-celled, not lobed. Yerbenace^, 609 



Ovules numerous, or at least 2 in each cell. 

 Ovary and capsule 1-celled. 



Herbs without leaves, parasitic. Orobanchaces:, 601 



Herbs, aquatic or marshy, with dissected leaves. . . . Lentibularie^, 605 

 Ovary and capsule 2-celled : placentas central. 



Seeds few, borne on hook-like processes. Acanthacej!, 606 



Seeds many or few, not on hook-like processes. , . . ScROPHULARiACEiE, 571 



Ovary and capsule incompletely 4-celled Fedalineje, 606 



* * Corolla slightly irregular : fertile stamens 5. 

 Filaments, or some of them, woolly : fruit a 2-celled capsule. , . Yerbascum, 573 



Filaments not woolly. 



Fruit a 2-celled capsule. . . , Hyoscyamus, 570 



Fruit 4 nucules : style arising from their midst Echium, 550 



* * * Corolla nearly or quite regular. 

 t Stamens as many as corolla-lobes. 

 Ovaries 2, united by styles or stigmas in flower, separate in fruit. 



Filaments separate : pollen granular. Apocynace.e, 521 



Filaments usually l-adelphous : anthers adherent to stigma ; pollen 



in masses. Asclepiade.*:, 523 



Ovary 1, divided into 4 lobes around the style BoRRAGiNEie, 529 



Ovary 1, not divided or lobed. 



1-celled : fruit a pod or capsuled MiMosEie, 211 



Style 1, stigma 1 : fruit a pod. 



Style 1, stigmatose on 2 lines : pyxis incompletely 4-celled. . . Plantago, 667 



Styles, stigmas, or parietal placenta", 2. ...... Gentiane^, 528 



Styles ; stigmas 2-lobed : fruit a small drupe SALVACORACEiE, 521 



2-10-celled, style 1 : partitions sometimes not found in fruit. 



Stamens distinct from corolla or nearly so. LiNEiE, 181 



Stamens inserted on corolla. 

 4 : corolla scarious : capsule imperfectly 4-celled Plantago, 667 



