ANALYSIS OF THE NATURAL ORDERS. 13 



F. COHORT 6. FLORIDE^E, OR FLOWERING ENDOGENS. 



Flowers (not on a spadix) in a small, dense, involucrate head..(0) 

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

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

 2 Perianth free from the ovary. (3) 



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

 3 Petals and sepals similarly colored. .(5) 

 4 Flowers imperfect ($ ? or $ 8 ?)-.() 

 4 Flowers perfect.. (b) 



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

 5 Leaves parallel-veined.. (6) 



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

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



a Low aquatic herbs HYDROCHARIDACE.E. 135 



a Climbing shrubby vines DIOSCORIACE.*. 143 



b Anthers 1 or 2, on the pistil (gynandrous) ORCHIDACE^E. 137 



b Anthers 1 or 5, free from the pistil. Leaves ample SCITAMINE.E. 138 



b Anthers 3 or G..(c) 



c Perianth woolly or mealy outside. Ovary half free H^EMADORACE^E. 141 

 c Perianth glabrous outside. .(d) 



d Anthers 3, opening crosswise, inward BURMANNIACE^E. 13(5 



d Anthers 3, opening lengthwise, outward IRIDACE^E. 142 



d Anther? 6, opening inward AMARYLLIDACE^E. 139 



Pistils 3 GO, distinct, forming achenia in fruit ALISMACE^E. 134 



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



g Leaves verticillate, in 1 or 2 whorls. Stigmas 3 TRILLIACE.E. 146 



g Leaves alternate.. (h) 



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



h Stigmas united into 1 COMMELYNACE.E 151 



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



k Flowers dioecious, 6-parted SMILACEJS. 144 



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



m Flowers colored, irregular or else triandrous PONTEDERIACE.E. 149 



m Flowers greenish, glume-like or scarious JUNCACE^E. 150 



n Leaves rush-like. Ovary of 3 1-seeded carpels j ^ELANTHACE^E 148 



n Leaves linear, lanceolate, &c. Ovary 6- GO- seeded.. . f *"' 



o Petals yellow, small but showy. Plant acaulescent XYRIDACEJE. 152 



o Petals white, minute, fringed. Plant acaulescent ERIOCAULONACEJE. 154 



G. COHORT 7. GRAMINOIDE^J, OR GRASS-LIKE ENDOGENS. 



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



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



Flower with several bracts (glumes and pales). Culm hollow } GRAMINEJI " 



Sheaths split on one side. Ovary 1-seeded. Styles 2 r " 



H. PROVINCE, ACROGENS. 



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



1 Leaves few, mostly ample and /rora subterranean rhizomes.. (a) 



