40 CHLORIS BOREALI-AMERICANA. 



The accompanjing figure was taken from cultivated specimens, 

 which perfectly accord with the spontaneous plant. 



In the Flora of North America, this plant, then known through 

 specimens in flower only, was doubtfully appended to a group of 

 ambiguous pentandrous species of Saxifraga. Afterwards, when 

 the fruit and seeds furnished additional characters, it was separated 

 to constitute a distinct genus, dedicated to the zealous and excel- 

 lent botanist who discovered it. At the same time, the transfer- 

 ence of the remaining pentandrous Saxifrages (5. Richardsonii and 

 S. ranunculifolia of Hooker) to Boykinia was proposed.* 



Thus considered, the genus Sullivantia is clearly distinguished 

 from all its allies, except the remarkable Leptarrhena, by its scobi- 

 form and somewhat winged seeds ; also from Heuchera by its two- 



consimilibus ovatis subunguiculatis albis infra medium pallide bimaculatis sepala 

 reflexa duplo superantibus ; filamentis clavatis ; carpellis discrelis demum dlvarica- 

 tis turgidis calyce liberis. — Variat foliis ovalo-oblongis vel rotundato-reniformibus, 

 basi aut subcordatis aut cuneatis. — Hab. In declivlbus humidis opacis montium 

 altiorum CarolinsB Septentrionalis. In horto floret Maio - Junio. 



Living plants of this species were gathered by myself in the Alleghany Moun- 

 tains of North Carolina, and probably of Virginia also, in the autumn of 1843, along 

 with those of S. Careyana, which this species so nearly resembles that the difference 

 was not detected until both came into flower the ensuing spring. The characters of 

 the two remain constant under cultivation. S. Caroliniana is distinguished from S. 

 Careyana by its refiexed (instead of barely spreading) calyx, its more strongly bimac- 

 ulate petals (those of S. Careyana prove to be spotted also but very faintly), and its 

 decidedly clavate filaments, which in S. Careyana are filiform. S. Caroliniana be- 

 longs, therefore, to the section Hydalica. " 



* Bot. Excursion to the Mountains of N. Carolina, in Sill. Journ., I. c, p. 21. — 

 Mr. Fielding, in his Sertum Plantaru?n, t. 57, has published a good figure of Boy- 

 kinia aconitifolia, justly remarking that it has no characters sufficient to separate it 

 from the pentandrous Saxifrages above mentioned. He therefore refers it to Saxi- 

 fraga. I have preferred to refer them to Boykinia. 



