
          Cambridge Friday morning 


 My Dear Friend


 Thanks for the parcel & your 
 mss. [manuscript] of Ericaceae. 


 As I am just now upon Pyrola
 I have a remark or two to make. I am sorry 
 you had not the specimens in your herb [herbarium] before you, 
 where you would certainly have done one of three things. 
 1. have kept P. [Pyrola] rotundifolia as put by Hooker, including 
 both asarifolia & uliginosa (color would be little objection, for
 I have a true P. rotundifolia with rose-purple blossoms. P. incarnata
 Fisch.! and some of Hooker's rose-color spec. [specimens] belong to 
 P. rotundifolia proper. Hooker has the latter amongst his, tho
 his character does not well apply as to Calyx. 
 Or, 2nd. Make 3 species, P. rotundifolia, with lancelate
 or ovate-lancelate [added: scarcely acute] rather long sepals, P. asarifolia,
 with (shorter?) [crossed out: and] broadly triangular acute or acuminate 
 sepals, quite agreeing with your char. [character] of P. uliginosa and with 
 the plants, except that the sepals are rather more than one
 fourth the length of the petals, & 3. P. uliginosa, with
 shorter ovate or acutish sepals. 
 Or, 3rd. Keep P. rotundifolia, and join P. asarifolia & P. uliginosa.
 A very slight & I fear not constant difference 
 in the form of the sepals alone separate the two latter;
 and [added: difference of] color disappearing as it certainly does. I think the question 
 is between the 1st & the 3rd. Hooker's Arctic pl. [plant] that 
 he mentions at the end of P. chlorantha, & the P. rotundifolia
 Kotzeb. [Kotzebue's] Sound, Beechey, are just P. uliginosa, with whitish 
 blossoms, also P. occidentalis R. Br. [Brown], [Hb.? [Herbarium?]] Banks! & Don [Monographie du genre Pyrola, par M. David Don],
 I suppose P. primula or P. Groenlandica Hornem are the same,
 so that the name P. uliginosa seems to stand but a
 poor chance.

        