200 ICOSANDRIA MOXOGYNIA. 



crenate; flowers dichotomal and terminal, solitary, yel- 

 low; exterior stamina petaloid or all fertile, from 20 to 30. 

 Species. 1. M. * aurea. Stem dichotomous; leaves 

 lanceolate-ovate, deeply and ang-ularly crenate; flowers 

 dichotomal, sessile; petals oval, acuminate, entire; cap- 

 sule about 3-seeded. Hab. On the shelving-s of rocks, 

 , and rocky hills, Louisiana, near tjie lead mines of St Louis, 

 and on the banks of the Missouri, below the confluence 

 of the Platte. Obs. The wiiole plant is extremely aspe- 

 rate and tenaceous; pubescence repeatedly barbed. Koot 

 succulent and tuberous; stems about \J, inches high, di- 

 varicate and dichotomously branched. Leaves 10 to 15 

 lines long", sessile, 6 to 8 lines wide, tlie upj)ermosi ovate, 

 the lower attenuated at both extremities, subacute; mai^ 

 gin particularly toward the middle deeply and inc.sely 

 crenate. Flowers solitary, of a deep golden yellow, 

 scarcely a third part so lajge as those of M. Idspida but 

 very elegant in form, steliately expanding, about 8 lines 

 in diameter, very evanescent, opening to the sun only 

 about 4 hours. Calix persistent, segments narrow and 

 linear. Stamina all equal and fertile, none of th«m peta- 

 loid, 20 to 22, nearly as long as the corolla; filaments sub- 

 ulate; anthers terminal distinct, small and nearly round. 

 Style filiform, the length of the stamina, convolute, mark- 

 ed with 3 long-itudinal striae as in Bartoniu^ also corres- 

 ponding with the number ofralves and seeds in the cap- 

 sule, stigma none. Capsule c}lindric, sessile, very small. 

 Seeds about 5, linear-oblong, smooth, subangular, nearly 

 the whole length of" the capsule, or longitudinally arrang- 

 ed. (The seeds of M. hispida according to the descrip- 

 tion of Cavanillts, are very asperate.") This species ap- 

 pears to be considerably allied to M. aspera, deciding 

 from figures and description. 



528. DECLMARIA. L. 



Calix superior 8 to 10 cleft. Petals S to 10. 

 Capsule 7 to 9-celled, many-seeded. Seeds sub- 

 ulate, minute. 



Sarmentose twining shrubs with ovate leaves; flowers 

 in cor}Tnbose panicles white and odorous. Stamina 16 

 to 25. ' 



Species. l.D.barbara. 2. sarmentosa. A genus pecu- 

 liar to the southern states of America. 



529. PHILADELPHUS. L. (Mot k-Orange.) 

 Calix superior, turbinate, 4 or rarely 5-cleft. 



