300 ICOSASDRIA AICNOGYJflA. 



crenate; fiowers dichotomal and terminal, solitary, yel- 

 low; exterior staTr.ina petalcid or all fei-t.K", from 20 to oO. 

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

 lanctoiate-ovate, deeply and ang-vilarly crenate; flowers 

 diclio'.omal, sessile; petals cvul, acuniinate, entire; cap- 

 sule about 3-seeded. Hab. On tiie sIk Ivings of rocks, 

 and rocky hills, l.ur.'isiana, r.ear the lead mines of St I^oiiis, 

 and on the banks of the Missouri, beiow the confluence 

 ofthe Piatte. Obs. I'he wholeplant is extremely aspe- 

 rate and tcoaceoiis; pubesc( liCe repeatedly barbed, l^)<)t 

 succulent and twbi-roiis: stems abovit I J, iochos hig'h, di- 

 varicate and diciioTomously branched. Leaves 10 to 13 

 lines loni^, sessile, 6108 lines wide, the uppeririost ovale, 

 t!ie lower attenuated at both extremities, subacute; inai*- 

 j^in particularly toward tlie iiiiddle deeply and incisely 

 crenate. I'iowers solitary, of a deep golden yellow, 

 scarcely a third part so lar:;e as those of M. hespida Init 

 very elegant in form, stcllately expanding, aboui 8 lines 

 in diameter, very evanesceni, opening to the sun only 

 about 4 hours. Callx persistent, seginents narrow and 

 linear. Stamina ail equal and ftrtile, none of them peta- 

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

 ulate; ar-thers terminal distinct, small and nearly round. 

 Style filitorm, tlie let gth ofthe stamina, convolute, mark- 

 ed with 3 longitudinal sirije as in Jiarionia, also cones- 

 ponding with'the number of-s-alves and seeds in the. cap- 

 sule, stign^a none. Capside t}lindric, sessile, \ery small. 

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

 Ihe whole length ofthe capsule, or longiuidinally arrang- 

 ed. (The seeds of M. hifcpuki arcordirig to the descrip- 

 tion of Cav&ndit-s, are very asptritte.) This species aj)- 

 pears to be considerably allied to M. asptra, deciding 

 from figures and description. 



328. DECUMAUIA. i. 



Calix superior 8 to ]0 cleft. Pdals 8 to 10. 

 Capsvle 7 to 9-cclled, many-seeded. ISteds sub- 

 ulate, minute. 



Sarmentose twining shrubs with ovate leaves; flowers 

 in corymbose panicles wl;ite and odorous. Stamina 16 

 to 25. 



SrzciES. l.H.barbara. 2- sarmeniosa. A genus pecu- 

 liar to tlie southern states of America. 



329. PHILADELPHUS. i. (Mock-Qrangc.) 

 Calix superioiv turbinate, 4 or rarejy 5-cleft. 



