DICHOTOMOUS ANALYSIS. 199 



189. Flowers gynandrous OrcMdace<B, 122 



Stamens and pistils separate 190 



190. Ovary inferior 191 



Ovary superior 199 



191. Veins of the leaves reticulated Diosooreacece, 118 



Veins of thejeaves parallel 102 



192. Veins diverging from the midrib Maro/iitaceoe, 123 



Veins paraltel with the midrib 193 



193. Stamens 2, or 3 Ilydrocharidacea:, 121 



Stamens 3 194 



Stamens 6 196 



194. Flowers yellow HoBmodoracecB, 126 



Flowers not yellow 195 



195. Loaves minute, subulate Burmanniacece, 125 



Leaves large, ensit'orm Iridacecc, 124 



IOC). Parasitic, growing on trees Bromeliacece, 129 



Not parasitic 197 



197. Flowers yellow or white 198 



Flowers not yellow AinaryUiddceLe, 127 



19S. Leaves grass-like ITypocridaceoe, 12S 



Leaves ensiform Ho^modoracece, 126 



199. Carpels separate Alismacem, 137 



Carpels united 200 



200. Sepals and petals distinct 201 



Sepals und petals confounded 203 



201. Stigma 1, leaves with parallel veins Syena, Coj)imelynacece, 136 



Stigmas 3, or 3-cleft 202 



202. Leaves linear, ensiform Xyridaceoe, 133 



Leaves broad, reticulateiy veined Ti-UliacecE, 120 



203. Flowers brownish Juncaceo:, 134 



Flowers colored 204 



204. Leaves fan-like JWmncece, 135 



Le.ives simple 205 



2 5. Leaves reticulateiy veined Smilucw, 119 



Leaves parallel veined 206 



206. Anthers extrorse 3Iel(i>itfiace<F, 131 



Anthers introrse LUiacexe, 130 



207. Flowers glumaceous 216 



Flowers not glumaceous 208 



2C8. Flowers on a spadix 209 



Flowers not on a spadix 218 



209. Fruit succulent Aracecc, 138 



Fruit dry , 210 



210. Capsule 5-celled, many-seeded 211 



Capsule 1-celled, 1-seeded 212 



211. Flowers pale yellow Anicecv, 13S. Acorns. 



Flowers blue or white Pontederiurecp, 132 



212. Leaves ensiform, marsh plants Aracece, 13S 



Leaves not ensiform, water plants Naiadacea:, lo9 



213. Floatin;.' plants. .' Aracece, 13S 



Lai.d plants 214 



214. Flowers in small dense heads liestiacecB, Uj) 



Flowers not in small dense heads 215 



215. Stamens 0, or more Aracece, 138. Jit/ncace(p, 13t 



Sii^mi'us less than 6 Alinmacece, 137 



210. Stem solid Cypcraci ce, 141 



Siem i-ouud and hollow Graminaoeoe, 142 



