1920] SCHNEIDER, NOTES ON AMERICAN WILLOWS. IX 19 



bear a rather conspicuous pubescence of silvery or fuscous silky hairs on 

 their lower surface. The mature leaves of this form seem to become gla- 

 brous (at least partly) like those of var. rosmarinoides, and I doubt whether 

 it can be kept as a separate variety under any name but var. rosmarinoides. 

 It is the same form which is called S, petiolaris var, angustifolia by Fernald 

 & Wiegand (in Rhodora xii. 137 [1910]). 



Andersson, in 18G8, distinguished two forms of var. gracilis: 1^ serico- 

 carpa, capsulis anguste conicis 2| lin. longis tenuiter sericeis, and 2^ lejo- 

 carpa, capsulis basi crassioribus glaberrimis viridi-testaccis. He does not 

 cite any specimen, and I have not yet seen a specimen with entirely glabrous 

 fruits. These are often, as Andersson in 1867 states in regard to gracilis, 

 only " parcissime pubescentibus," but the pedicel always is minutely pu- 

 bescent. Therefore I cannot say whether there is a real f. lejorarpa or 

 not. 



synonymy 



follo"w 



^^s: 



S. petiolaris var. rosmarinoides, comb. nov. — S. purpurea Richardson 

 apud Franklin, Narr. Jour. Polar Sea, 752 (Bot. App, vii. 24, no. 387) 

 (1833), fide specimen originale, non Linnaeus. — Hooker, Fl. Bor.-Am. ii. 

 148 (1839). — S. rosmarinijolia Hooker, 1. c., non Linnaeus. — S. gracilis 

 Andersson in Ofv. Svensk. Vet.-Akad. Forh. xv. 127 (1858). — Rydbcrg, 

 Fl. Rocky Mts. 195 (1917). — S. petiolaris * rosmarinoides Andersson in 

 Ofv. Svensk. Vet.-Akad. Forh. xv. 127 (1858). — S. petiolaris * S. gracilis 

 Andersson in Svensk. Vet.-Akad. Handl. vi. 109 (Monog. Salic.) (18G7). 

 S. petiolaris y avgiistijolia Andersson in De Candolle, Prodr. xvi.^ 234 

 (1868), pro parte. — Fernald & Wiegand in Rhodora, xii. 137 (1910).— 

 S. petiolaris 5 gracilis Andersson in De Candolle, 1. c. 235 (1868), exck prob. 

 f. lejocarpa, — Macoun, Cat. Can. PL iii. 453 (1886). — S. petiolaris Ryd- 

 berg, Fl. Reeky Mts. 195 (1917), pro parte minima. — A typo ])raecipue 

 differt: foliis angustiorlbus, plusminusve lineari-lanceolatis vcl lincaribus, 

 saepe subacuminatis, basi acutioribus, integerrimis vel plerlsque tantura 

 partini (saltern ad apicem) minute denticulatis, saepissime 3: 0.5 ad 6: 0.7- 

 0.8 cm., in ramulis vegetioribus ad 7.5: 1-1.3 cm. magnis, subtus initio satis 

 fulvo-sericeis, demum glabris glaucis vel in forma sericeo-pilosa utrinque 

 plusminusve sericeis (pilis argenteis saepe cum fulvis mixtis); ameutis 

 fructiferis subbrevioribus, crassioribus et minus laxifloris, vix ultra 3; 1.8-2 

 cm. magnis, fructibus 7-9 mm. longis, pedicello 3-4 mm. longo excluso. 



Of typical S. petiolaris I have seen specimens from the following states: 

 New Brunswick (St. Stephen), Massachusetts, New York, New Jersey, 

 Pennsylvania, Ohio, Indiana, Michigan, Minnesota, Ontario, Manitoba 

 (West Selkirk, Lake Winnipeg), and Saskatchewan (Cumberland House). 



To var. rosmarinoides I refer specimens from Alberta, Saskatchewan, 

 Ontario, Quebec and Maine. Some forms from Maine need further ob- 

 servation. There is also a specimen from British Columbia (Cache Creek 

 May 23, 1875, J. Macoun, no. 24,700, 0.; f.) which I am not able to deter- 

 mine at present. 



