158 THE CACTACEAE. 



inner perianth-segments acuminate, 2 to 2.5 cm. long, often lacerate towards the tip; filaments and 

 style pinkish, the latter paler and much longer than the stamens; stigma-lobes 6, long and slender, 

 rose-colored. 



Collected by Dr. J. N. Rose on Pichilinque Island, March 27, 191 1 (No. 16508, type) ; 

 on Cerralbo Island, April 19, 1911 (No. 16895); ^^^ on Catalina Island, April 16, 1911 



(No. 1683 1). 



136. Neomanunillaria swinglei sp. now. 



Stems cylindric, i to 2 dm. long, 3 to 5 cm. in diameter; axils of tubercles more or less setose; 

 radial spines rather stout for this group, spreading, dull white with dark tips; central spines 4, 

 ascending, dark brown or black, the lowest one elongated (i to 1.5 cm. long), hooked at apex or 

 sometimes straight; outer perianth-segments greenish or sometimes pinkish; margins somewhat 

 scarious ; inner perianth-segments narrowly oblong, nearly white with a brown stripe down center ; 

 style pink, twice as long as the pink filaments; stigma-lobes 8, linear, pointed, green; fruit dark 

 red, clavate, 14 to 18 mm. long; seeds i mm. in diameter, constricted below, black with a large 

 elliptic basal hilum. 



Common about Guaymas, Sonora; flowers and stems described from Rose's plant 

 (No. 12568, type) and Johnston's plant (No. 3086), and the fruit and seeds from one 

 collected by Swingle; also collected by Dr. W. S. W. Kew in 1920. 



In cultivation the inodorous flowers remain open for several days (at least three) . 



Growing with this species (see Rose, No. 12569) were plants with all the central spines 

 straight. This may be the plant from Guaymas which Scheer called "a very robust species 

 of Mammillaria sphaerica."* Neither flowers nor fruit were seen. 



137. Neomammillaria dioica (K. Brandegee). 



Mammillaria dioica K. Brandegee, Erythea 5: 115. 1897. 

 Mammillaria fordii Orcutt, West Amer. Sci. 13: 49. 1902. 



Either solitary or clustered, cylindric, 5 to 25 cm. high or even higher ;t axils of tubercles woolly 

 and short-setose; radial spines 11 to 22, white, the tips often brownish to black or rose-colored 

 throughout, 5 to 7 mm. long, spreading; central spines 3 or 4, brownish, the lower one a little longer 

 than the others and hooked; flowers borne towards top of plant, yellowish white with purplish 

 mid-rib, 10 to 22 mm. long, incompletely dioecious; outer and inner perianth-segments usually 

 6 each; outer perianth-segments reddish, especially along midrib, the inner ones oblong, pale cream- 

 colored, notched or toothed near apex ; style white ; stigma-lobes 6, linear, bright yellow to brownish 

 green; fruit scarlet, clavate, 10 to 25 mm. long; seeds black. 



Type locality: West coast of Lower California. 



Distribution: Southwestern California and northwestern Lower California. According 

 to Mr. Orcutt, this plant extends east of the coastal mountains on the border of Imperial 

 and San Diego Counties. 



Although we have not seen the type of Mammillaria fordii we have referred it here 

 on the advice of Mr. Orcutt, the author of this species. 



Illustrations: Cact. Mex. Bound, pi. 8, f. 9 to 14, as Mammillaria goodridgii. 



138. Neomammillaria goodridgei (Scheer). 



Mammillaria goodridgei t Scheer in Salm-Dyck, Cact. Hort. Dyck. 1849. 91. 1850. 

 Mammillaria goodridgii Scheer in Seemann, Bot. Herald 286. 1856. 

 Cactus goodridgii Kuntze, Rev. Gen. PI. 1: 260. 1891. 



Stems clustered, erect, globose to cylindric, up to 10 cm. long, 3 to 4 cm. in diameter; axils 

 of tubercles not setose; radial spines 12 to 15, spreading, white, sometimes with dark tips; central 

 spines usually i, white below, brown above, hooked; flowers perfect, rose-colored, 15 mm. long; 



* Bot. Herald 286. 



t In February 1922, Mr. C. R. Orcutt sent us a single plant from the Mason's Valley on the eastern side of the 

 Coast Mountains in San Diego County, California, which was the largest solitary one we had ever seen, being more 

 than 33 cm. long, 10 cm. in diameter, and weighed 3 lbs. 13 oz. Three small buds were produced near the middle of the 

 plant. 



X Given as Mammillaria goodrichii, in error. 



