VOL: 5] Notes on Cactee. ” 
M. RECURVATA Engelm. JM. recurvispina Engelm, M/. Noga- 
lensis Runge Cat. abounds in collections in two forms, one with 
bright yellow, the other with much paler or whitish spines. A 
character which appears not to have been noticed is the presence, 
just back of the spines, in the groove of a large oval gland. By 
the kindness of Prof. Trelease I have been able to verify this 
upon the type of JZ. recurvispina. In cultivation this species 
appears to flower with difficulty, but the few cases noticed show 
the flower and fruit to be remote from the centre. 
MAMILLARIA PRINGLEI (Coult.) Cont. Nat. Herb. iii. 1og 
(under Cactus). The type of this species is not to be found in 
the Gray Herbarium at present; it may be misplaced. No plant 
of the kind is in our set of Pringle’s, but at my request Mr. 
Pringle very kindly sent me for examination the cacti of his 
private herbarium. I find among them a plant labelled ‘‘Mamil- 
laria, Tultenango Cafion, 17 Oct. 1890, No. .3679,’’ which 
agrees with the description—though I should call the flower 
purple, not red. It seems to me scarcely to differ from J/. 
Carretii Schumann. Both plants are described as having naked 
axils, but my specimen of the latter, which came from McDowell, 
Mexico, and so probably from the original collection, is more 
or less setose. 
M. armillata*. Stems somewhat attenuate, reaching 3 dm. 
in height, 4-5 cm. in diameter, usually in clusters of 3-12, from 
the base, often branching above; tubercles somewhat leathery in 
texture; conical, somewhat angled; axils setose and sparsely 
woolly; radial spines 9-15, 7-12 mm. long, the inner half whitish 
or grayish; centrals 1-4, 1o-20 mm. long, the lower one hooked 
and longer, all, and the outer part of the radials dark brown, yel- 
lowish or gray; flowers 1-2 cm. long, scarcely spreading, flesh 
color; fruit red, clavate, 114-3 cm. long; seeds coriaceous, 
dull black, about 1 mm. long, obliquely obovate, constricted 
above the more slender basal portion; surface covered with 
minute, not closely contiguous pits, the intervening spaces min- 
utely wrinkled; hilum basal, narrow. San José del Cabo, Baja 
* Plates of the new species of Cacti will appear at the end of the volume. 
