120 Kansas Acade^ny of Science. 



lil. Smilax glauca Walt. Smooth-leaf Greenbrier. Dry soil in thick- 

 ets, E. K.; freq,aent. May. (ASU) 



748. Smilax rotundifolia L. Greenbrier. Woods and thickets, general 

 over the state; common. May. (ASU) 



749. Smilax hispida Muhl. Thorniest Greenbrier. Thickets, E, K.; 

 occasional. April. (ASU) 



750. Smilax pseudochina L. Thornless Greenbrier; China-root. Sandy 

 soil, low grounds, E. K. ; frequent. Armed at base when old. April. 

 (ASU) 



751. Smilax bona-nox L. Bristly-leaf Smilax; Bamboo-brier. Thickets 

 and low grounds, E. K. ; frequent. May. 



Family 54. Dioscoreace.e. Yam Family. 

 Smooth, slender, twining vines, from fleshy or woody rootstocks. Leaves 

 with petioles and laminae cordate to halberdoid, campylodrome-nerved and 

 reticulate-veined ; petioles articulating with the vine as in dicotyls. In- 

 florescence in racemes or panicles ; flowers small, unisexual. Perianth six- 

 parted, segments all alike ; in the carpellate flowers persistent, united at 

 the base and adherent to the ovulary. Staminate flowers with six or three 

 fertile stamens, sometimes with a rudimentary ovulary. Carpellate flowers 

 with an inferior trilocular ovulary; styles and stigmas distinct, sometimes 

 with three or six staminodia. Ovules two in each loculus. Fruit a three- 

 valved, three-angled, or three-winged capsule. Endosperm of the seed 

 fleshy or cartilaginous ; embryo small. 



752. Dioscorea paniculata Mx. (D. villosa L.) Wild Yam-root. Moist 

 woods and thickets in valleys of S. E. K. ; frequent. June. (S) Medicinal. 



753. Dioscorea divaricata Blanco. Cinnamon-vine. With a disposition 

 to grow naturally from the little self-shed tuberlets on the vines, whenever 

 they have fallen where they escape the severe frosts of winter. The grow- 

 ing tubers need but slight protection from frost ; each successive year sends 

 them deeper into the ground and increases the liability to escape winter- 

 killing. 



Subclass E. ORCHIDIFLOR.a:. Heterophyls. 

 Orchis-flowered Monocotyls. 

 Perianth hexaphyllous, zygomorphous, rarely actinomorphous, the calyx 

 and corolla often differing widely in form, color, texture, and purpose, 

 monosymmetrical, more or less two-lipped, the various segments, unless 

 they balance by being horizontally opposite, differing individually in some 

 respect. Androecium seldom of six fertile stamens, but usually of one or 

 more fertile stamens and enough staminodia to make the complement six or 

 three. Pollination almost exclusively entomophilous. Gynoecium normally 

 tricarpellate, but usually unilocular by suppression of two of the carpels or 

 by reduction of the three parietal walls. 



Order XXVIII. IRIDALES. The Irids. 

 Inflorescence in umbels or umbellate clusters subtended by membranous 

 bracts. Perianth heterophyllous, actinomorphous or zygomorphous; seg- 

 ments distinct or united at base and coherent with the ovulary. Androecium 

 hexandrous, or of three stamens with or without three staminodia. Gynoe- 

 cium an inferior trilocular capsule, many-seeded. 



