ANALYTICAL KKV. SI 



B> Petaloideocs Division. Flowers not cof/ectrd on a spndir. furnished with 

 Jloral envelopes (jierianl/i) answering to calyx or to both ciilij.c and corolla, either 

 herhictous or colored and /ittal-ll/ce. 



1. Perianth adherent to the whole surface of the ovary. 

 Flowers dioecious or polygamous, rcfriilar. 



i\(iuiitics: ovules luul seeds several or numerous. IlYDHociiAinnACE.T:, 494 

 Twiners : ovules and seeds one or two in eaeli till. DioscouEACKyE, 513 



Flowers perfect : ovules and seeds usually numerous. 



Stamens only one or two : llower irregular, gynandrous. Okciiidace.k, 497 



Stamens three. 



Anthers introrsc, ojjcning t^ansve^scly^ . . Biismaxniace-k, 490 



Anthers introrse or versatile, opening lengthwise. II.lmodokali:.!:, 514 



Anthers extror.^e, opening lengthwise. .... Ikidaci;.!:, 515 



Stamens G : flowers usually on a seajje from a hull). A.mauvli.idacI';.!;, 512 



2. Perianth adherent only to the base or lower half of the ovary. 

 Perianth woolly or roughish-mealy : the leaves equitant. H/i:mou()kaci;.e. 514 

 Perianth smooth : the leaves gras.s-like. Stcnanthium, &e., in Lii.iACK.ii, 520 



3. Perianth wholly free from the ovary. 

 Pistils numerous or few in a head or ring. . . . Alismace^, 490 



Pistil one : anthers 1-eelL'd : flowers dia-eious. Tendril-hearing. S.milace^, 518 

 Pistil one, compound (cells or placentie mo^tly 3) : anthers 2-eelled. 

 Perianth not glumaccous or chaffy : flowers not in dense heads. 

 Stamens 6 (in one Sinilacina 4), similar and ])erfeet. 



Scurfy-leaved epijihyte : seeds hairy-tufted. . . Euo.meliace.e, 515 

 liush-like marsh-herhs : carpels separating closed from the 



axis : seed without alhumen. Trigloehin, in Ai.is.iiace.e, 490 



Terrestrial, not rush-like : seeds with albumen. 



Perianth of similar divisions or lobes, mostly colored. ^ 



Perianth of 3 foliaceous and green sepals and .3 col- [- Lii.iace.e, 520 



orcd withering-persistent petals. Trillium in) 



Perianth of 3 persistent green sepals, and 3 I'phemc- 



ral deli<|ue.scent petals ..... (^om.melynace.e, 546 

 Stamens 6, dissimilar, or only three with perfect anthers. 

 Perianth of 3 herbaceous sepals and 3 uiu'(iual 



and ephemeral ])etals. .... CoMMF.i.YNArK.E, 540 



Perianth tubular, 0-lobed P().NTi;i)i;uiAri;.i:, 544 



Stamens 3, >imilar. Moss-like .aquatic. Mayaca, under Xyimdace.*:, 547 

 Perianth wholly glumaccous, of similar divisions. Rushes. Ji'ncace.e, 536 

 I'erianth partly glumaceous or ehafl-like: flowers in very 

 (h'li.sc heads. Rush-like or aquatic. 

 Flowers jierfect : inner perianth of three yellow petals : 

 jierfect stamens and jdumo.xe sterile (ilaments each 

 3 : pod 1 celled, many-.seedcd on 3 pjirietal ])laecnta'. Xvridace.e, 547 

 Flowers moutecious or dia-eious, whitish-bearded : sta- 

 mens 4 or 3 : pod 2-3 celled, 2- 3-seeded. Lkiocalloxace.e, .549 



