508 THE AMERICAN MIDLAND NATURALIST 
816. Amarella Gurliae [nell in Am. Midl. Nat. Vol. II: 
142% ATO VI): 
Butte. 
817. Amarella acuta (Michx.) Lunell. 
Gentiana acuta Michx. Fl. Bor. Am. I: 177. (1803). 
Pleasant Lake. 
818. Amarella theiantha Lunell in Am. Midl. Nat. Vol. II: 
TAG (OTT). 
Flowers 5—merous; the tube quite closed, of a bright sulphur- 
yellow color, the lobes white; setae of the crown numerous, about 
10 to each lobe, or altogether 50, and plainly discernible especially 
on the fresh plant. A. strictiflora (Rydb.) Greene has the flowers 
4—merous, ochroleucous,and the tube open; setae of the crown 
few or wanting. 
819. Amarella theiantha var. lactea Lunell in Am. Midl. 
Nat: Vol. Il: 142. (1913). 
Towner. 
820. Amarella theiantha var. livida Lunell in Am. Midl. 
Nat. Vol. III:142 (1913). 
Butte. 
DASYSTEPHANA Rensalmus, Specim. Hist. Pl. p. 68. 
fea, (16r1); >Adans.\Fam):,502.°(1763): 
821. Dasystephana affinis (Griseb.) Rydb. 
Gentiana affinis Griseb in Hook. Pl. Bor. Am. 2: 56. (1834). 
Leeds, York. 
822. Dasystephana puberula (Michx.) Small. 
Gentiana puberula Michx. Fl. Bor. Am. I: 176. (1803). 
Leeds. 
823. Dasystephana Andrewsii var. dakotica (A. Nels.) 
Nwd. & Jl. 
Gentiana Andrewsii var. dakotica A. Nels. in Bot. Gaz. XVI: 
68. (1913). 
Butte, Turtle Mountains. 
Family 100. APOCYNACEAE Lind. Nat. Syst. ed. 2: 299. 
(1836). 
CYNOPAEMA (Gr. xtwv dog, 17ua, TO, a bane or sorrow 
to....)Lunell, nom. nov. 
Apocynum Diose. 4: 81 = Anoxtvor, Sibth. Fl. Graeca= 
Cynanchum erectum. Tour. Linn. Gen. no. 305. 
ey 
