490 



than in the Nebraska specimens. Little Elk Canyon, altitude 1,100 m., June 28; 

 Elk C'auyou, altitude 1,200 m.. June 20; south of Lead City, altitude 1,700 m., 

 July (5 (No. 580). 



Ceanothus fendleri Gray, PI. Fendl. 20 (1S40). 



Tills is common in the Limestone District, west of Custer. Bull f^priugs, altitude 



2,000 m., .lulv 26 (No. 500). 



VITACEiE 



Vitis vulpiua L. Sp. PI i, 203 (1753). 



liiTuiosa, altitude 1,0.50 m., June 24 ; Little Elk, altitude 1,100 m.. Juno 2S; Elk 

 Canyon, altitude 1,200 m., June 29 (No. 501). 



Parthenocissusquinquefolia(L.) Planch, in DC. Monogr. Pliau. v, i)t. 2, 488(1887); 

 lltiUra (jiiiiiqiu'/oHu L. Sp. I'l. i, 202 (1753). 



Elk Canyon, altitude 1,200 m., .luue 29 (No. 592). 



ACERACEiE. 



Acer iiegiuido L. Sp. PI. ii, 1056 (17.5i>). 



In fruit : Hot Springs, altitude 1,0.50 m., June 18 (No. 593). 



ANACARDIACE^ffi. 



Rhus radicans toxicodendron (L.) Pers. Syn. PI. i, 325 (1805) ; Rhus toxicodendron 

 L. Sp. Pl.i, 266 (1753). 



Eor remarks on this form of the poison ivy, see page 152 of this volume. 



In the foothills: Hermosa, altitude 1,100 m., June 28 (No, 591). 



Rhus trilobata Nutt. ; Torr. & Gr., Fl. i, 219 (1838). 



I found stems of this shrub 2.5 to 3 m. high and 7 to 8 cm. in diameter, and with leaf- 

 lets 3 to 4 cm. long. Hot Springs, altitude 1,100 m., June 11 and August 8 (No. 595). 



PAPILIONACfiiE. 



Thermopsis rhombifolia (Pursh) Richards. Bot. App. 737 (1823); Cytisus rhombi- 

 fuUa Pursh, Fl. Supi>l. 741 (1814). 



Common : Custer, altitude 1,700 m., June 23 (No. 596). 



Lupinus sericeus Pursh, Fl. ii, 468 (1814), var. 



This is L. ornaiKS Dougl., var., of Newton & Jenney's Report. ' 



The Black Hills and Wyoming specimens have the Howers dark blue and the calyx 

 little gibbous. I think, however, they belong to this species rathir than to L. huco- 

 plnjUuK, with which in some cases they have been placed. Elk Canyon, altitude 

 1,200 m., June 29; near Bull Springs in the Limestone District, altitude 1,900 m., 

 July 27 (No. 507). 



Lupinus parviflorus Nutt.; Hook iV Arn. Bot. Beech. 336 (1840). 



Common: Little Elk Canyon, altitude 1,100 ni., June 28; Elk Canyon, altitude 

 1,200 m., June 29; Lead City, altitude 1,700 m., July 4; Bull Springs, altitude 1,900 m., 

 July 28 (No. 598). 



Lupinus pusillus Pursh, Fl. ii, 468 (1814). 



Hill near I'all lvM\er Falls, altitude l,fMX) m.. Juno 17 (No. 599). 

 Trifolium pratense L. Sp. PI. ii, 768 (175:>). 



EsciijK-d in meadows: Bull'ah) (iap, altitmlo 975 m., June 21; Hot Springs, altitude 

 1,050 m., August 2 (No. 600). 



Trifolium repens L. Sp. PI. ii, 767 (1753). 



Meadows: Custer, altitude 1,6.50 m., August 1 (No. 601). 



Lotus ameiicanus (Nutt.) Bisch. Litt. Ber. Linuiesi, xiv, 1.32(1840); Trigonella 

 amni(tniu Nutt. (Jen. ii, 120 (1S18). 



Hills, near Whitewood, altitude 1,150 m., .Inly 7 (No, 602). 



' Geol. Surv. Black Hills, 532 (1880). 



