rCOSANDRIA— POLYGYNIA. Potentilla. 421 



and coriaceous, strongly and acutely serrated, the terminal tooth 

 smallest, as in the preceding and following species, green on 

 both sides ; the upper surface naked, appearing minutely granu- 

 lated under a high magnifier, furrowed along the rib and veins ; 

 under somewhat paler, the margins and ribs beset with nume- 

 rous coarse hairs : stem-leaves of 3 narrower leaflets ; the up- 

 permost nearly sessile and entire, often simple. Stipulas hairy, 

 all combined with the footstalks ; the lower ones narrowest and 

 acute ; upper broader and shorter, various in size, less re- 

 markable than in the last. Fl. 2 or 3 at the upper part of each 

 stem, on long, hairy, solitary, simple stalks. Cat. very hairy, 

 and in some degree downy, its outer segments in some of my 

 specimens very distinctly three-ribbed, but this character is not 

 universal. I recommend it to future observation. Pet. some- 

 what heart-shaped, bright yellow, as long as the calyx, or longer. 

 Recept. hairy. Seeds scarcely at all wrinkled. 



All the above synonyms appear to me correct. There is a confu- 

 sion between tlie two works of Clusius, and his figure here in- 

 dicated, reprinted in Gerarde, is taken byDr.Nestler for a good 

 representation of P. opaca. It is but just to observe that Lin- 

 naeus was of the same opinion. But the figure of Clusius to 

 which Nestler refers as verna, has ternate leaves, and upright 

 .stems. Haller quotes Qidnquefoliinn tertium of Clusius for an 

 acute-leaved variety of vcrna ,- but this is certainly quite unlike 

 our plant. I need not here refer to supposed varieties of this 

 species, which are described by various foreign writers, but not 

 known in Britain, nor do I perceive that any extraordinary diffi- 

 culties attend our verna. In a garden it becomes very luxuriant, 

 but the stems continue prostrate, and the outer segments of the 

 calyx are either three-ribbed or not, on the same plant. 



Dr. Nestler refers to Engel. Bot. t. 37, as if it were a work of \'il- 

 lars, and the plant were there named serotina; but this is the 

 fault of his printer. 



7. P. opaca. Saw-leaved Hairy Cinquefoil. 



Radical leaves of seven hairy, linear-wedge-shaped leaflets, 



deeply serrated throughout; stem-leaves ternate, mostly 



opposite. Stems recumbent. 

 P. opaca. Linn.Am.Avad.v. \.27-\. Syst. Nat.cd.\0.v.2. 10G4.A. 



Sp. PI. 713. mild. V. 2. I 103. Comp. 80. Engl. Bot. v. 3:). 



t. 2449. Hook. Scot. 162. 1). Don Tr. of fi'ern. Soc. v. 3. 30 1. 



Jac(j. Coll.-v. 1 . 33. Ic. Bar. t.9\. Hall. fun. in Ser. Mus. v. 1 . 54. 



t.A.f. \. Nestl. Potent. jA. 

 On the mountains of Scotland. 

 Received from Scotland by the laic Mr.Donn of Cambridge. Said 



to have been found on \hc hills of Clova, Angusshire, as well as 



in IVrtlishire. bv Mr. (i. Don. 



