> 31. Coryphantha vivipara (Nuttall) Britton and 
CORYPHANTHA. 43 
> 30. Coryphantha chlorantha (Engelmann). 
SMammillaria chlorantha Engelmann in Rothrock, Rep. U. S. Geogr. Surv. 6::127. 1878. 
Cactus radiosus chloranthus Coulter, Contr. U. S. Nat. Herb. 3: 121. 1894. 
Mamumillaria radiosa chlorantha * Schumann, Gesamtb. Kakteen 481. 1898. 
Plant cylindric, sometimes 20 to 25 cm. high, 8 cm. in diameter; tubercles closely set and entirely 
hidden by the densely matted spines; flowers small, 35 mm. broad; outer perianth-segments ciliate; 
inner perianth-segments yellow or greenish yellow, linear-lanceolate, acute; stigma-lobes white; 
fruit central, green, 2.5 cm. long, juicy, bearing 5 or 6 scales near top; seeds brown, flattened, 1.5 
mm. long, reticulated. 
Type locality: Southern Utah, east of Saint George. 
Distribution: Southern Utah, western Arizona, central Nevada, and eastern southern 
California. 
Mammillaria utahensis Hildmann, cited by Schumann (Gesamtb. Kakteen 481. 
1898) as a synonym of M. radiosa, may have been based on this plant. 
Illustrations: Forster, Handb. Cact. ed. 2. 328. f. 33; Gartenflora 32: 87; Deutsche 
Gart. Zeit. 7: 53, as Mammillaria chlorantha; Schelle, Handb. Kakteenk. 236. f. 151, as 
M. radiosa chlorantha. 
Plate v, figure 7, is from a plant collected by I. Tidestrom at the type locality in 1919, 
which flowered in the New York Botanical Garden, May 27, 1919. Figure 42 is from a 
photograph of a plant collected by Major E. A. Goldman in Prospect Valley, Arizona. 
Fics. 40 and 41.—Coryphantha durangensis. 
Rose in Britton and Brown, Illustr. Fl. ed. 2. 2: 
571. 1913. 
Cactus viviparus Nuttall, Fraser’s Cat. No. 22. 1813. 
. . Sar . 819. — 
Mammillaria vivipara Haworth, Suppl. Pl. Suce. 72. 1519. 8x0. 
“ »Mammillaria radtosa Engelmann, Bost. Journ. Nat. Hist. oi 96. 1850 
Echinocactus radiosus Poselger, Allg. Gartenz. 21+ 107- ¢ 
Echinocactus viviparus Poselger, Allg. Gartenz. 21: 107. a 5369 1856. 
Mammillaria vivipara vera Engelmann, Proc. Amer. reer 3: 269. 1856. 
Mammillaria vivipara radiosa Engelmann, Proc. Amer. 4 c _ - 35g, as subspecies. 
Mammillaria vivipara radiosa Engelmann, Cact. Mex. 804 : — 
Cactus radiosus Coulter, Contr. U. S. Nat. Herb. 3: 120. 6: ie "1896. 
Mammillaria hirschtiana Haage, Monatsschr. Kakteen&. : 1917 
Coryphantha radiosa Rydberg, FI. Rocky Mountains 5°F- ; _ 
ited, although we believe that Engelmann 
: ec 
* Schumann credits this trinomial to Engelmann at the place her 
never used it. 
