513 
Steironema ciliatum (L.) Baudo, Ann. Sci, Nat. ser. 2, xx, 346 (1843); Lysimachia 
ciliata L. Sp. Pl. 147 (1753). 
The leaves of the specimens from Custer are scarcely subcordate at the base. 
Rochford, altitude 1,600 m., July 11; east of Custer, on the French Creek, alti- 
tude, 1,500 m., July 22 (No. 866). 
Naumburgia thyrsiflora (L.) Duby, in DC. Prodr. viii, 60 (1844); Lysimachia 
thyrsiflora L. Sp. Pl. i, 117 (1753). 
Wet places: Elk Canyon, altitude 1,200 m., July 29 (No. 867). 
Centunculus minimus L. Sp. Pl. i, 116 (1753). 
In Ruby Gulch, northwest of Custer, altitude 1,700 m,, August 20 (No. 868). 
OLEACEZ. 
Fraxinus pennsylvanica Marsh. Arb. Amer, 51 (1785). 
Along. Squaw Creck, above Hermosa, altitude 1,050 m., June 22 (No. 86). 
Fraxinus pennsylvanica lanceolata (Borck.) Sargent, Silva Amer. vi, 50 (1894) ; 
Fraxinus lanceolata Borck. Handb. Forstbot. i, 826 (1800). 
Together with the preceding (No. 870), 
APOCYNACES. 
Apocynum androsemifolium L. Sp. Pl. i, 218 (1753). 
Borders of woods: Hermosa, altitude 1,100 m., June 24; Rapid City, altitude 
1,000 m., July 25; Little Elk Canyon, altitude 1,100 m.,, June 27; Lead City, altitude 
1,700 m., July 6 (No, S71). Specimens collected in Elk Canyon, altitude 1,200 m., 
June 29, and at Hot Springs, altitude 1,100 im., August 3, are ambiguous between 
this species and .t, cannabinum. The leaves are short-petioled, and the corolla 
greenish white and smaller than in -f. androsemifolium, and the branches upright 
(No. 872). 
ASCLEPIADACES. 
Asclepias ovalifolia Dec. in DC. Prodr. vili, 567 (1844). 
On French Creek, below Custer, altitude 1,500 m., July 22 (No, 873). 
Asclepias verticillata pumila Gray, Proc. Amer. Acad, xii, 71 (1876). 
Prairie: Minnekahta, altitude 1,300 m., August 6 (No, 874). 
Acerates angustifolia! (Nutt.) Dec. in DC, Prodr. viii, 522 (1844); Polyotus angustt- 
folius Nutt. Trans, Amer. Phil, Soc. mn. ser. v, 20 (1853-1837). 
Minnekahta Plains, altitude 1,300 m., August 6 (No. 875). 
Acerates viridiflora® (Raf.) Eat. Man, ed. 5,90 (1829); Asclepias viridiflora Raf. 
Med. Rep. xi, 360 (1808). 
Only one specimen was collected: Minnekahta Plains, altitude 1,300 m., August 6 
(No. 876). 
GENTIANACE. 
Gentiana acuta Mx. FI. i, 177 (1803); Gentiana amarella acuta Herder, Act. Hort. 
Petrop. 1, 428 (1872). 
The specimen appears to be a form of this species modilied by the habitat, viz, a 
heavily shaded hillside. The whole plant is light green, the leaves broad and thin, 
3- to 5-ribbed. Young plants can searcely be distinguished from those of the next. 
The flowers are greenish yellow, occasionally a little bluish on the hmb, South of 
Asclepias viridiflora to the genus dcerates. 
