BOTANICAL EXCURSION TO NORTH CAROLINA. 43 



" Flora," is referred to Boyhinia occidentalism in the supple- 

 ment to that work, no pentandrous Saxifrage remains, except 

 the ambiguous S. Sullivantii, Torr. & Gr. But the authors 

 of the Flora having received fruiting specimens of this 

 interesting plant, do not hesitate to remove it from the genus 

 to which it was provisionally appended, and to dedicate it to 

 their esteemed correspondent, the promising botanist who dis- 

 covered it. 1 



While descending the mountain on the opposite side, we 

 met with Clethra acuminata, a very distinct and almost arbo- 

 rescent species, which is well characterized by Michaux. The 

 flowers were not yet expanded ; but towards the end of July 

 we obtained from other localities specimens in full flower, 

 while the racemes and capsules of the preceding year were 

 still persistent. The conspicuous bracts, it may be remarked, 

 are as caducous in the wild as they are said to be in the 

 cultivated plant ; usually falling before the flower-buds have 

 attained their full size. We also saw Camjmnula divaricata, 

 Michx., not yet in flower ; and obtained fruiting specimens 

 of the Convallaria umbellulata, Michx. (Clintonia, Raf., not 

 of Dougl.). While the character in Michaux is drawn from 



i Sullivantia. Torrey & Gray, " Fl. N. Amer." suppl. ined. — Calyx 

 inferne imo ovario adnatus, limbo quinquefido. Petala 5 spathulata, un- 

 guiculata, integra, summo calycis tubo inserta, niarcescentia. Stamina 

 5, laciniis calycinis breviora : antherse biloculares. Styli, 2, breves ; 

 stigmatibus simplicibus. Capsula calyce inclusa, bilocularis, birostris, 

 polysperma, rostris intus longitudinaliter dehiscentibus. Semina adscen- 

 dentia, scobiformia ; testa membracea, relaxata, utrinque ultra nucleum 

 ovalem alatim producta. Embryo cylindricus albumine vix brevior. — 

 Herba humilis, in rupibus calcareis Ohionis vigens ; radice fibrosa per- 

 enni ; foliis plerisque radicalibus, rotundato-reniformibus, inciso-dentatis 

 sublobatisve, longe petiolatis ; scapo gracili, decumbente ; floribus parvis 

 (corolla conspicua, alba), cymuloso-paniculatis, post antbesin in apicem 

 pedicellorum arete deflexis. 



S. Ohionis. — Saxifraga ? Sullivantii, Torrey & Gray, " Fl. N. Amer." 

 i. 575. — Genus a Saxifraga prsecipue diversum staminibus petalis iso- 

 meris, et seminibus scobiformibus : a Boykinia calyce fere libero, atque 

 seminibus ; ab Heuchera capsula biloculari, etc. ; a Leptarrhena stamini- 

 bus 5, antheris bilocularibus, et seminibus alato-marginatis, nee utrinque 

 subulatis. 



