310 IIORTUS JAMAICENSIS. yellotT- 



in a more arched direction than in the others from the footstalk to the point of the 

 Jeaf ; they are sometimes opposite, sometimes alternate, on long round pedicels. This 

 yam is called the Afou yam, which is planted and hears at the same time as the white, 

 also from cuttings ; it is of a smaller size air! its inside is of a yellow colour, and tine dry 

 meally texture; its skin has a hitter taste winch slightly pervades ttie whole yum ; this does 

 not keep well out of the ground. 



5. OPPOilTIFOLIA. OPPOSITE-LEAVED. 



Leaves opposite, ovate, acuminate. 



Stem round, smooth, twining; leaves cordate, acuminate, opposite, petiole;! ; flowers 

 androgynous ; calyx one two or three simulated squamnise ;coroha -ix-subulated, patent, 

 erect, petals, arising from the margins of the germ, and three times the length of the 

 stamens, which are six short- subulated filaments, with ad hereutdidymous globose an- 

 thers ; the styles are three, patent, reflex, sulcated ; germ oblofig ano trigonal, with a rib 

 at each angle. This is called Guinea Yam, from th.e'p Ian ts havingbeen first brought 

 from Africa ; it bears a yarn much resembling the negro yam in taste and consistence. 



C. BULBIFERA. BULB-BEARING. 



Leaves cordate, stem even, bulb-hearing. 



Stalks slender, somewhat woody, twining, smooth ; leaves""cordate, opposite, on long 

 petioles; flowers androgynous. The negroes call this kind Ac^m, and they cultivate 

 it on account of the fruit it bears on its stems; which is very irregularly shaped, of a brown 

 colour, rough skin, about the size of lri^ii potatoes, which it much resembles in taste, 

 either roasted or boiled. 



It is thought that all these species of dioscorea have been originally imported into Ja- 

 maica, with the exception of the wild variety of the saliva, which i> the only one found 

 in the island not in a state of cultivation. They now form a principal article of tood lor all 

 classes. Barham says the juice of thedeaves is good against the stings of scorpions j 

 aud that they make a good fomentation for ulcers. 



Yaw-weed See Indian-Mulberry. 

 Yellow-Balsam. See \\ ild- Rosemary. 



YELLOW-SANDERS. HUDSONIA. 



Ci. 11, or. 1. Dodecandria monogynia. Nat. or. Bicorncs. 



This genus was so named in honour of William Hudson, author of Flora Angelica 



Gen. char. Calyx three or five-leaved, three parted, tubular ; no corolla ; stamens 

 fifteen, anthers roundish ; capsule one-seeded, three-valved, three-seeded; seeds 

 -rounded angular. 



arborea. TREF. 



Cucurhitifea arborjoi Ic, foliis sub-rofundis confertim vascen/ibus, ra- 

 vmlorum eit)tm,iutibas tumidis. Sloane, v. 2, p. 17(3, t. 228, f. 3. 



Leaves ob-ovate, thtck, fleshy, terminal, peduncles solitary ; flowers in globose 

 racemes. 



This 



