230 JOmXAL OF THE AllXOLD ARBORETUM [vol. i 



evolutae ovoidao, obtiisiusculac, ciro. 5 mm. lonf^ac, ut ramuli Iiornotini 

 pilosac et coloratao. Folia adulta firma sed tcnuia, minora infcriora plus- 

 miniisve oblanccolata vol spalhulata, saepisshnc apice obtusa vol fore ro- 

 tundata, circ. 8:3 ad 20:6-7 mm, magna, normalia sui)eriora oblanccolata, 

 clli})tico-lanccolata vol saepissime rhomboidco-ol>lanceolala, basi sn])ito 

 sensimve ciineata, apice acuta vol breviter acuminata, 2.5: 0.6 ad 3.8 : (vel 

 ad 4:1.3) cm. magna, omnia intcgerrinui, rarius infima lenuiler dcMiticulata, 

 supcrne initio plusminusve dense adpresse breviter argenteo-sericea, sub- 

 mlcantia, adulta glabriora sed saepissime tantum infima mim"ma satis 

 glal)rata, cano-vlridia, costa ner\nsque lateralibus utrinqne 4-5 (-6) an- 

 gulo valde acuto a costa abeuntlbus et marglnem subparallelibus ad apicem 

 currentil>us vix vel paullo visibilibus, epidermicic ut subtus slomatifera; 

 subtus plusminusve ut superne pilosa, colorata et nervata, magis glabres- 

 centia, costa leviter prominente; ])ctioli (l-)2-5( 6) mm. longi, su])orne 

 sulcati et villosuli, subtus glabri vel subpilosi; stipulae nullae vel minimae, 

 ovato-rotundae, tenuiter glanduloso-fimbriatae, vix ultra 1 nun. longae. 

 Amenta plusminusve coctanea, parva, ellij)tica, densiflora, pedunculis 

 1-4 mm. longis foliola parva lanceolata vix ultra 1:0.4 cm. magna superne 

 fere glabra subtus plusminusve sericea gerentibus sufTulta; mascula cir- 

 citer 5-12 (-18): 5-8 nun. magna, pedunculo excluso; bracteae o])ovato- 

 o])longae, apice rotundatae, atrofuscae, tenuiter sericeo-villosae (i)ilisquam 

 bracteae circiter § vel ^ brevioribus), vix ultra 2 nun. longae; stjnuina 2, 

 filamentis tenuibus liberis glabris bractcam demum 22-plo supcrantibus, 

 antheris minimis siibglobosis flavis; glandulae 2, ventralis ovato-rectangu- 

 laris truncata quam bractca I ad §-pIo brcvior, dorsalis saepissime minor et 

 filiformis, saepe minima; amenta feminea sub anthesi circiter ad 1 : 0.6 mm,, 

 fructifera ad 2.5:1 mm. pedunculo excluso magna, densa; bracteae ut in 

 flori])US masculis; ovaria anguste ovoideo-conica, glabra, rariter l)asi id est 

 pediccUo brevissimo sparse pilosa, subsessilia; glandula 1, ventralis, ut in 

 masculis, vel angustior; styli })reves sed dislincti, 0.5-1 mm. longi, apice 

 intcrdum subbifidi, stignuitibus minimis bifidis divaricatis ad 3-j)lo longi- 

 ores; fructus maturi rufescentes circiter 4.5-5 (-5.5) nun. longi, e basi 

 ovoideo-rliomboidali conico-subrostrati pedicello brevissimo glandulam 2-3- 

 plo brevlore excluso. 



The following specimens of typical S. Wolfii have been examined. 



Colorado. Dolores County: Rico, 3000-3250 m., July 1, lf)09, coll.? (No. 

 2340, ri. of Colo.; fr.; N.). ? Pitkin County : Elk Mountains, Mt. Baldy, about 

 3900 m., July 11, 189 L A\ C. Smith (ni.,f.; M.); Lake County : LcadviUc: bank of 

 stream, 3300 lu., June 25, 1910, F. W. Clockcy (No. 2()(;9, fr.; C); IVnnesscc Pass, 

 3500 ni.. June 24, 1893, De Alton Saunders (ni., d.; N.). Park County : Mosquito 

 Puss, 3500 ni., September 4, 1898, J. G, Jack (st.; A.); South Park, 1873, J, Wolf 

 (m., f.; N., W.); same locality, Juno, 1873, J. Wolf d- J. T, Roihrock (No. 8^20, m., 

 f.; type in C. [slicct 303047] co-type in G.; No. 828, m., f.; G.; sanio \n^\ sub No. 

 372 mixed with 5, vionticola). ? Jefferson County : Soutli Platlc (or on Platte 

 Hiver in Park County), June, 1873, Wolf & Rothrock (No. 8^24, in., f. ; C, G. ; No. 827, 

 m., f.; G.). Gilpin County: Eldorado to Baltimore, about 2800 to 3200 m., 

 June 20, July 10, 1903, F. Tweedy (No. 5C04, fr. im.; N.). Larimer County: 

 Camp Creek, swampy land, July, 1903, L, N, Goodding (No. 1403, f. adult.; Cor., G. 



