1997 



* HORKELIA fusca. 



Dusky Horkclia. 



DECANDRIA POLYGYmA. 

 Nat. Orcl. RosACEJE, § PoTENTILLEiE. 



HORKELIA. Schlecht. Calyx campanulatus, semidecemfidus, laciniis 

 alternis accessoriis. Petala5, parva. 5/a»M7ia 1 0, biseriata, calycis parietibus 

 inserta. Receptaculum conicuni, siccum, villosum. Onaria indefinite nume- 

 rosa. Shjli simplices, cum ovario articulati, subterminales. Achenia calyce 

 inclusa. Schlecht. in LinncBa. 2. 26. 



H. fusca I glandulo8o-pubescens, foliis radicalibus pinnatis 6-7-jugis laciniis 

 cuneato-oblongis pinnatifidis vel palmatifidis incisis, paniculis corymbosis 

 capitatis, sepalis integerrimis, bracteis palmatis capitulis brevioribus. 



It is rather singular that the original species of this 

 genus should never have been found by Mr. Douglas in 

 California, although he detected in that part of America as 

 many as five new species. Of these one has been published 

 in the Botanical Magazine under the name of H. congesta 

 (fol. 2880) ; the subject of this notice is another ; and a 

 brief account of three others, in the Herbarium formed by 

 that Naturalist, will be found below. They are all erect 

 herbaceous plants, resembling some Potentillas in their 

 general aspect, but with flowers collected into heads, ungui- 

 culate petals, a campanulate calyx, and ten stamens, often 

 with ovate petaloid filaments. They form a transition from 

 Potentilla to the genus Sibbaldia, and thus assist in estab- 



* " Named in honour of John Horkel, Professor of Physiology at Berlin, 

 who would be admitted on all hands to be one of the first botanists of our age, 

 if he could but be persuaded to cotnmit to paper the treasures of his immense 

 erudition, and of hii profound knowledge of nature and of plants." — Schlecht. 



