MILA. 211 



spines from an areole; flowers said to be like those of the type. It also suggests Frailea 

 cataphracta. 



We obtained a flower and seeds of this species from Dr. Spegazzini and have also 

 examined a sketch made by him. 



Illustration: Anal. Mus. Nac. Montevideo 5: pi. 17, as Echinocactus pygmacus. 



7. Frailea caespitosa (Spegazzini). 



Echinocactus caespitosus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 495. 1905. 



Simple or densely cespitose, half buried in the ground; separate plants small, turbinate to cla- 

 vate or even oblong, 4 to 7 cm. long, 1.5 to 4.5 cm. in diameter, deeply umbilicate at apex; ribs n 

 to 22, low, obtuse, 4 to 5 mm. broad, somewhat crenate ; areoles orbicular to short-elliptic, 3 to 4 mm. 

 apart; radial spines 9 to 11, setaceous, appressed, yellowish, very short, 3 to 6 mm. long; central 

 spines 1 to 4, unequal, more or less curved, the longest one 10 to 15 mm. long; flowers small, 3.5 to 

 4 cm. long; inner perianth-segments yellow, lanceolate, acute; filaments yellow; style white; stigma- 

 lobes purplish violet; axils of scales on ovary and flower-tube densely gray-tomentose and setose. 



Type locality: Mountains near Montevideo. 



Distribution: Uruguay. 



8. Frailea knippeliana (Quehl). 



Echinocactus knippelianus Quehl, Monatssehr. Kakteenk. 12:9. 1902. 



Simple, small, cylindric, 6 cm. high, 2 cm. in diameter; ribs 15, low, divided into tubercles; 

 spines about 16, yellowish; flowers 2.5 cm. long, yellowish; wool in the axils of the flower-scales long, 

 white; seed 1.5 cm. long. 



Type locality: Paraguay. 



Distribution: Paraguay. 



We know this species from descriptions and illustrations and from a single flower sent 

 by L- Quehl in 191 2. 



Quehl and Schumann place it near Echinocactus gracillimns. 



Illustrations: Knippel, Kakteen pi. 8; Schelle, Handb. Kakteenk. f. 118, as Echino- 

 cactus knippelianus. 



26. MILA gen. now 



Plants growing in small clumps, more or less cylindric, resembling in habit and texture some of 

 the species of Echinocereus; ribs low, bearing closely set areoles with acicular spines; flowers small, 

 campanulate, yellow, borne at the apex of the plant; scales on the ovary and flower-tube minute, 

 bearing a few long white hairs in their axils; fruit small, globular, green, shining, nearly naked, at 

 first juicy; seeds black, tuberculate, longer than broad, hilum large, subbasal, white. 



Type species: Mila caespitosa Britton and Rose. 



The generic name is an anagram of Lima, the city in Peru near which the plant is found. 

 Only one species is known. 



1. Mila caespitosa sp. nov. 



Plants low, rarely as much as 15 cm. high, 2 to 3 cm. in diameter; ribs usually 10, 3 to 5 mm. 

 high, the margins nearly straight; areoles at first densely brown-felted, 2 to 4 mm. apart; spines at 

 first yellowish with brown tips, in age becoming brown throughout; radial spines 20 or more, usually 

 about 10 mm. long; central spines several, the longer ones up to 3 cm. long ; flowers about 1 .5 cm. long, 

 yellow but drying reddish; inner perianth-segments oblong; tube-proper very short; stamens shorter 

 "than the perianth-segments; style 8 mm. long; fruit 5 to 10 mm. in diameter; seed 1 mm. long. 



Collected by J. N. Rose near Santa Clara, Peru, July 3, 1914 (No. 18555, type). This 

 plant is common near the mouth of the narrow valleys between the low hills bordering on the 

 Remac Valley. It does not extend into the main valley which is here devoid of all vegeta- 

 tion. In early July Dr. Rose found it both in flower and fruit. It is not closely related in 

 flower, fruit, or appearance to any of the so-called species of Echinocactus. 



