1J^19] SCHNEIDER, NOTES ON AMERICAN WILLOWS. YL 89 



Gap, August 6, IS97, J. Mac oun (No. 94,323, 0.» sL). Calgary South District: 

 Elbow River, Bragg's Creek, July 4, 1897, J, Macoun (No. 94,324, 0., st.; "a small 



tree"). 



There is also a specimen before me collected by W. C. Cusick in 1886 (No. 

 ISOS''^, St.; W.) in wet alpine meadows apparently at the type locality of 

 S. suhcoerulea, which in the pubescence of the young twigs and of the upper 

 surface of the leaves agrees more -with some of the forms just mentioned 

 than with typical suhcoerulea but the branchlets are partly somewhat 

 glaucescent. 



Jepsonii 



ifol 



Bot. Cal. II. 87 (1879). — Jepson, Fl. Cal. 342 (1909). — S. pellita Bebb in 

 Bot. Gaz. XVI. 105 (1891), non Andcrsson. — Ball in Trans. Acad. Sci. St. 

 Louis, IX. 81 (1899), pro parte. — S. sitchensis Hall, Yosemite Fl. 67 (1912), 

 non Sanson. — Frutex ut videtur erectus, habitu et altitudine milii ignota; 

 ramuli novelli laxe vel dense breviter villosulo-tomentosi, hornotini plus- 

 minusve glabrescentes et ut annotini glabri (vel tantum partim parce 

 tomentelli) castanei vel atro-purpurascentes, plerique nitiduli, vetustiores 

 cinerascentes; gemmae perfecte evolutae nondum visae, novellae ut ramuli 

 pilosae; folia matura satis chartacea, firma, anguste oblanceolata, basi 

 cuneata, apice obtusa ad acuta, minimis infimis exccptis 2 : 0.6 ad 6.5 : 1.2 cm. 

 vel latiora obtusiora ad 5:1.3 cm., surculorum ad 12.5:1.5 cm. (Jepson no. 

 386) vel anguste elliptica vel ctiam ovato-lanceolata ad 9: 1.2 vel 10:2.5 cm, 

 magna, margine integerrima, interdum leviter undulata, saepe subrevoluta, 

 superne initio plusminusve sparse (vel in surculis dense) breviter sericeo- 

 villosula, dein costa tomentella excepta glabrescentia, intense sed ut videtur 

 satis obscure viridia, costa nervisqiie lateralibus subplanis, epidermide 

 estomatifera, subtus tomento sericeo denso adpresso micante vel subopaco 

 ut In S. sitchensi (vel in .S. suhcoerulea) vestita, costa elevata flava etiam 

 tomentella (rarius fere glabrescente), nervis lateralibus utrinque circ. 10-16 

 fere occultis vel pauUo prominulis; petioh plusminusve tomentosi, 2-6, 

 etiam in surculis vLx ultra 7-8 mm. longi; stipulae nuUae vel pleraeque 

 parvae, semiovato-lanceolatae, integrae vel glanduloso-denticulatae, ut 

 folia pilosae, ad 3 mm. longae, vel in surculis (specim. Jackii) semicordatae, 

 ad 11 mm. longae et 5 mm. latae. Amenta subpraecocia vel coetanea, 

 cylindrica; mascula subsessilia vel pedunculo ad 3 mm. longo folioUi minima 

 2-4 dense normaliter pilosa gerente suffulta, 1-2:1 cm. magna; bracteae 

 oblongo-obovatae, satis dilute brunneae vel apice subfuscae, dense sericcae 

 pilis brae team vix aequantibus; stamina 2, filamentis liberis vel in parte 

 inferiore amenti saepe basi vel ad medium coalitis glabris brae team demum 

 ad 2-2 l/4-plosuperantibus, antheris ut videtur semper aureis ellipsoideis 

 circlter 1 mm. longis thecis inacqualibus; glaiidula 1, vcntralis, ovoideo- 

 conica, truncata,bractea l/2vel l/3 brevior; femineasub anthesi 1.5-2.5:0.6 



' It gives me great pleasure to dedicate this species to Professor W. L. Jepson without 

 whose rich collections of Willows I should not have been able to elucidate several of the in- 

 teresting but little understood Californian species. 



