ANALYSIS OF THE NATURAL ORDERS. 13 



F. COHORT 6. FLORIDA, OH FLOWERING ENDOGENS. 



Flowers (not on a spadix) in a small, dense, involucrate head..(o) 

 Flowers (not on a spadix) solitary, racemed, spicate, &c..(2) 

 2 Perianth tube adherent to the ovary wholly or partly. .(4) 

 8 Perianth free from the ovary. . (8) 



3 Petals and sepals differently colored (except in Medeola, 147)..() 

 3 Petals and sepals similarly colored. .(5) 

 4 Flowers imperfect ( $ 9 or & 9 9 ) . . (a) 

 4 Flowers perfect.. (ft) 



5 Leaves net- veined, broad.. (k) 

 5 Leaves parallel-veined.. (6) 



6 Styles and often the stigmas also united into ono. .() 

 6 Styles and stigmas 3, distinct.. (w) 



a Low aquatic herbs HYDROCHAUIDACE^E. 135 



a Climbing shrubby vines DIOSCORIACE.*. 143 



ft Anthers 1 or 2, on the pistil (gynandrous) ORCHIDACE.S:. 1 .7 



ft Anthers 1 or 5, free from the pistil. Leaves ample SCIT AMINES. 13>t 



ft Anthers 3 or 6 . . (c) 



e Perianth woolly or mealy outside. Ovary half free H.EMADORACEJE 141 



e Perianth glabrous outside, .(d) 



d Anthers 3, opening crosswise, inward BCTUCANNIACEVE. 136 



d Anthers 3, opening lengthwise, outward IKIDACE.E. 142 



d Anthers 6, opening inward AMABYLLIDACEJE. 139 



Pistils 3 OO, distinct, forming achenia in fruit ALISMACEJE. 134 



Pistils 3 only, more or less united, .(g) 



g Leaves verticillate, in 1 or 2 whorls. Stigmas 8 TRILLIACE^E. 1 4(5 



g Leaves alternate.. (A) 



h Stigmas 3. Plants with dry leaves, often epiphytes BBOHELIACE^. 140 



h Stigmas united into 1 COMMELYNACE^E. 151 



k Flowers perfect, 4-parted ROXBURGHIACE^S. 145 



k Flowers dioecious, 6-parted SMILACE.. 144 



m Flowers colored, regular. Stamens 6 (4 in one species) LILIACE.K. 147 



m Flowers colored, irregular or else triandrons PONTEDERIACE^E. 149 



m Flowers greenish, glume-like or scarious JUNCACEJB. 150 



n Leaves rush-like. Ovary of 3 1-seeded carpels MKLAHTHAOM. 148 



n Leaves linear, lanceolate, &c. Ovary 6- 00 -seeded... ' 



o Petals yellow, small but showy. Plant acaulescent XYRIDACE^E. 152 



o Petals white, minute, fringed. Plant acaulescent ERIOCAULONACE<B. 154 



6. COHORT 7. GRAMINOIDE/E, OR GRASS-LIKE ENDOGENS. 



Flowera with 6 bracts in 2 whorls (sepals and petals). Culms solid ORDER 150 



Flower with a single bract (glume). Culm solid, sheaths entire CYPERACE^K. 15 j 



Flower with several bracts (glumes and pales). Culm hollow. GRAMINR "a 



Sheaths split on one side. Ovary 1-eeeded. Styles 2 I " 



H. PROVINCE, ACROGENS. 



| Plants with well-developed foliage.. (1) 



^ Leaves few. mostly ample and from subterranean rhizomes.. (a) 



