214 PLANTS OF MASSACHUSETTS. 



woods in May, nearly a foot high, with 3 large broad-rhomboidal 

 leaves ; flowers commonly dark-purple, sometimes white, green- 

 ish on the outside, standing on a footstalk a little declined, and 

 rather nodding. Medicinal. 



T. cernuum. L. Nodding Wake Robin. Has its flower 

 hanging on a recurved foot-stalk, with lanceolate and recurved 

 white flowers, with a stem a foot or more high ; leaves broad, 

 rhomboidal, rather obtuse ; woods ; May. 



T. grandiflorum. Salisb. Large Flowered. Stem near a 

 foot high, with large, white, or reddish flowers, having spatulate 

 and lanceolate petals, and much longer than the calyx ; leaves 

 sessile, broad, rhomboid-ovate ; moist woods ; May ; Pelham. 

 It has not been found in Berkshire County, though it abounds in 

 the State of New York. 



T. pictum. Ph. Painted or Variegated Wake Robin. 

 T. erythrocarpum. Mx. Grows about 8 inches high, and has 

 white flowers, with purple veins, the petals being oval-lanceolate, 

 acute, and recurved ; woods ; May. A beautiful flower. 



ORDER 250. DIOSCOREiE. The Yam Tribe. 



DicEcious ; perianth 6-cleft, equal ; stamens 6, rising from the 

 base of the perianth ; ovary inferior, 3-celled ; style 1 , and stigma 

 3-parted ; leaves with reticulated veins ; flowers small, in spikes. 



DioscoREA. L. 20. 6. 



Named in honor of Dioscorides, a Greek physician, supposed 

 to have hved in the time of Nero ; a very important group of 

 plants in this genus, found chiefly in tropical regions. Capsule 

 3-celled, triangular, compressed ; seed membranaceous on the 

 margin. 



D. villosa. L. A twining vine, delicate, turning from right 

 to left, with alternate or opposite whorled and cordate leaves, 

 pubescent beneath, 9-nerved ; rises sometimes 12 feet ; lower 



