308 DICOTYLEDONOUS PLANTS. 



H. oleifcra MM. Pyrularia pubcra Mich. 



HAB. Mountains. Penn. to Geor. ; rare. May, June. ^>. 

 Shrub 4 feet high with a very deep root. Leaves oblong-ob- 

 ovate, entire, acuminate, 2 3 inches long, petiolate, pubescent 

 when young. Flmcers in a terminal raeeme, small, greenish- 

 yellow. Whole plant more or less oily. Oil Nut. 



3. THESIUM. Linn. 



Perianth 4 5-cleft. Stamens 45, opposite the lobes of 

 the perianth, villous externally. Style simple, 1-seeded, 

 crowned by the persistent perianth. Pentandria. Monogynia. 



T. umldlatum Linn. : stem round and erect ; leaves oblong-ovate, 

 obtuse, smooth ; panicles terminal, subcorymbed. Comandra umbel- 

 Iota Nutt. Hamiltonia umbellate Spreng. 



HAB. Rocky hills. Subarc. Amer. to Geor. W. to Miss. July, 

 Aug. 2f. Stem 8 12 inches high. Leares alternate, entire, 

 sessile, mucronate. Flmrers white, in a terminal corymb. It 

 is still doubtful whether this deserves to be separated from Thc- 

 sium. It appears to agree very well with Hamiltonia. 



Bastard Toad-flaj. 



ORDER CV. ARISTOLOCHLE. Juss. Lind. 



Flowers monoclinous. Perianth superior, tubular, 3-cleft, 

 regular or very unequal ; aestivation valvate. Stamens 6 12, 

 cpigynous, distinct or adhering to the style and stigmas. Ova- 

 ry inferior, 3 6-celled ; ovules numerous ; style simple ; stig- 

 mas radiating, as numerous as the cells of the ovary. Fruit 

 dry or succulent, 3 6-celled. Seeds numerous ; embryo mi- 

 nute, placed in the base of fleshy albumen. 



Herbs or shrubs. Leaves alternate, simple, often with leafy 

 stipules. 



1. ARISTOLOCHIA. Linn. 



Perianth tubular, ventricose at base, dilated at 'the apex 

 and ligulate. Anthers 6, subsessile, inserted into the style. 

 Stigma 6-cleft. Capsule 6-sided, 6-celled. 



Gynandria. Hexandria. 



1. A. sipho L'Hcrit : stem twining ; leaves cordate, acute ; pedun- 

 cles 1 -flowered, furnished with an ovate bract ; corol ascending, the 

 border 3-cleft and equal. 



HAB. Mountains. Penn. to Car* June. *>. A vine climbing 

 over trees of large size. Leaves very large, alternate, sprinkled 

 with hairs. Flowers solitary, brown. Dutchman's Pipe. 



