laitWH «FECIES OF DHOSEB-A. 10/ 



Fromjrtiie sca[>e of> the d. rotund, bein^ more slender, 

 froiitcdie if^reater de^rree of curvature which the raceme 

 as&uiues, froHi Jthii iijreater number and sn»aller size of the 

 6o\f|;r8,> lilmu vhat is^observed in tlie d. louolfoliu, I can at 

 once ItlV, ullihough I see no other part ol' the plant, when 

 theflca4)e.is.pce8vhted, to which of the «pecie,s it belongs* 



Beside the difference of size and form in the two specieftand in the 

 of droscri mentioned, it inuy be remarked, tiiat in the J«aTei. 

 rotundifolia the leaves in general spread almost horizontally, 

 but iu the /owy//b/ia ihey grow nearly erect : in the former 

 the petiole or leafstalk is covered all over with long white 

 hairs; in the latter species it ii almost naked, a hair only 

 occurring here and there, at considerable distances. 



Being well aware of the influence of soil in me t amor- These dlffer- 

 phosing plants, 1 questioned whether the illftercnces, which f"*^^^ "°^ ?^' 

 1 have just detailed, between the d. rotund, and long, flutnce vf soil, 

 might uot be produced by soil alone. On reflection, how- 

 ever, I was obliged to lay aside this notion, for the follow- 

 ing reasons, 1st. In White Moss, near Manchester, and 

 in the Paisley Moss, i have often seen the two species 

 growing in contact with each other. 2. I observed the d, 

 totund. in Truflbrd Moss, and about Kersal Moor (both 

 near ^Manchester) in very moist soil, though I do not re- 

 collect meeting with a single plant of the d. longi" 

 folia. 5, The plants of the d, longifolia, which bore the 

 fewest flowers, were all dwarfish ; showing, that, as the 

 plant diminished in size, so did the flovv«'rs decrease in 

 number. 4th. 1 have iiever been able, like Scopoli, to 

 trace the «;radation, from the one species to the other. 



iiojvever nearly allied the d. rotund, and long, lusy seem 

 at tirst sight, 1 think, from the reasons above unsigned we 

 are fully authorized, to reckon them distinct £j>ecies : 

 indeed had there been no other difference in the plants, ex- 

 cept in the shape of tbe leaves, we might be' justified in 

 foundihg specific characters on thia cifcuihstance alone,' 

 ucctjVding to the Lmnean pi-imjipbK '^^"'^>'^**' *^^ 



^FKe f(iilowin|''ipecific' characters' %"pe' euflUffent' fbr n specific char- 

 ilora Fjritaimica, •" aaets. 



DroserarbtiindifoliarV ToHre brbicutati»." 



D. longifulia. Foliii oblonj^ii. 



I com* 



