157 
of flowers or fruit. Before his death, Dr. Robbins told me that he 
had become convinced that this should be marked as a variety 
of pauciflorus, and in that opinion I fully concur. 
36. P. pectinatus, L. Spec. 20; Am., N. Eng. to N. Mex. 
and Oregon; for., from Gr. Brit., Cont. Eu., India and Brazil; 
* spec., Ex. Herb. Robbins. 
Var. (?) /atifolius, Robbins. One of orig. spec. on which 
Robbins founded the var. It is very similar to, if not the same 
as P. flabellatus, Bab. 
37. P. perfoliatus, L. Spec. 15; Am., from N, J. and 
Del. to Wis.; for., from Gr. Brit. and Germany; * one spec. 
Ex. Herb. Dr. Robbins. 
Var. Janceolatus, Robbins. Spec. 4.; N. J., Nevada, Pacific 
Coast; * type spec. Ex. Herb. Dr. Robbins. 
38. P. plantagineus,DuCroz. For. sp.; spec. 2, Germany. 
39. P. polygonifolius, Pourr. For. sp.; spec.1, from Gr. Brit. 
40. P. prelongus, Wulf. Spec.3; Am., Mass. ; for., Eu. ; 
*spec, from Sweden, coll. Dr. Tiselius, and Ex. Herb. Dr. 
Robbins. ; 
41. P. pulcher, Tuckerm. Spec. 4; one of the spec. con- 
tributed by Prof. Tuckerman, from Spot Pond, Stoneham, Mass., 
the locality in which it was first found, without flower or fruit, 
however; * spec. Ex. Herb. Dr. Robbins. 
42. P. pusillus, L., (including var. tenudssimus, M. and K.) 
Spec. 23; Am., from N, J. to Utah and Brit. Am. ; for., Abys- 
sinia; * spec. Ex. Herb. Dr. Robbins. 
43. P. Robbinsii, Oakes. Spec. 5; N. Eng., Pa., Pacific 
Coast; * type spec., Ex. Herb, Robbins. 
44. P. rufescens,Schrad. Spec. 11; Am., from N. J., N. Y. ; 
for., Germany, * Sweden. 
* Forma rivularis, Sond. One spec.; Sweden, com. Dr. G. 
Tiselius. 
45. *P. rutilus, Wolfg., (P. cespitosus, Nolte.) For. sp.; 
from Sweden, com. Dr. G. Tiselius. 
46. P. Spirillus, Tuckerm. Spec. 10; N. Eng, N. J. 
Among these are type spec. from Tuckerman, and from Herb. 
Chapman; doubtless given to Chapman by Tuckerman or Rob- 
bins; *spec. Ex. Herb. Robbins, 
