1918] SCHNEIDER—AMERICAN WILLOWS 329 
mascula pedunculis 0.5 ad 1.5 cm. longis exceptis (2—-)2.5-4 cm. 
longa et o.8-1 cm. crassa; bracteae oblongae vel obovato-oblongae, 
apice obtusae vel rotundae, rarius acutiusculae, concolores et strami- 
neae vel ut videtur saepius pl. m. bicolores, apice purpurascentes vel 
fuscescentes, utrinque villosae et apice pl]. m. sericeo-villosae; 
stamina 2, filamenta libera (rariter ad basim paullo connata), basi 
vel fere ad medium pl. m. pilosa (an interdum glabra ?), adulta 
bracteis duplo ad 2 . splo longiora; antherae ut videtur ellipsoideae, 
flavae vel initio roseae; glandulae vulgo 2, interdum dorsalis non 
visa; ventralis late ovato-rectangularis vel oblongo-conica, apice 
truncata vel apice incisa vel bi(—3)fida, quam bractea 2-2. 5plo 
brevior; dorsalis vulgo distincte minor et angustior, integra; 
feminea sub anthesi vulgo 2-4:0.8-1 cm. magna, fructifera laxiora 
satis elongata 3.5 ad 7 cm. longa et circ. 1.5 cm. crassa, pedunculis 
1-3 cm. longis exclusis; bracteae oblongae, obtusae, iis florum 
mascul. similes; ovaria sub anthesi ovoideo-oblonga, subsessilia vel 
pedicello glandula breviore suffulta, dense albo- vel griseo-villoso- 
tomentosa; styli distincti, subcrassi, integri vel apice bifidi vel fere 
bipartiti brachiis saepe divaricatis quam stigmata bifida oblonga 
vix vel circ. $plo longiores; glandula 1, ventralis, pl. m. late ovato- 
rectangularis et integra vel bifida ad bipartita, bractea circ. duplo 
brevior; fructus maturi ellipsoideo-conici, ut ovaria vel laxius vil- 
losi, pedicello vulgo distincto glandulam interdum 3 (rarius 2plo) 
superante excluso (6-)7—-8(—9) mm. longi, valvis apertis paullo 
recurvatis. 
his variety seems closely connected with the following one by inter- 
mediate forms, although the extremes look rather different. 
S. GLAUCA var. glabrescens, nov. comb.—S. glaucops, var. gla- 
brescens And. in DC. Prodr. 167: 281. 1868.—S. Austinae Rydbg., Fl. 
Rocky Mts. 198. 1917, non Bebb, pro parte.—Frutex ut in var. acuti- 
folia descriptus, ab ea signis sequentibus praecipue differt: ramuli 
novelli vulgo minus dense villosi, hornotini pl. m. glabrescentes, 
rarius ab initio fere glabri vel citissime glabri, annotini biennesque 
glabri vel sparse (saltem partim) pilosi, olivaceo-purpurascentes, 
pl. m. nitiduli; folia apice saepe magis acuta, margine (sal- 
tem inferiora) saepius sed satis obsolete denticulata, majora 
