SYNOPSIS OF THE CACTACEA OF THE UNITED STATES. 131 
. M. scotymorpEs, Scheidw. (1841) : globosa s. ovata, subsimplex; tuberculis conicis, superioribus elongatis 
incurvis aga A ; aculeis radiantibus 14-20 rectis s. plerumque recurvis albidis s. corneis, superioribus longioribus, 
centralibus 1-4 longioribus obscurioribus curvatis, superioribus sursum versis cum radialibus implicatis, inferiore 
robustiore longiore decurvo. 
South of the Rio Grande; not yet discovered in our territory. — Plant 2-3 inches high ; tubercles 5-8 lines 
long ; radial spines 5-10 lines, Cae central ones 9-16 lines long. Flowers yellow, 2 inches long. — Perhaps this and 
oth the foregoing species are only forms of the Mexican M. cornifera, of De Candolle. Only a close examination 
~ of these plants in their native wilds will enable us to decide this point. 
23. M. cALcARATA, E. in PI. Lindh. 2, 1850 (M. suleata, E. in Pl. Lindh. 1, 1845. M. strobiliformis, Muhlenpf.? non 
Scheer): globosa, prolifera, cespitosa ; tuberculis e basi dilatata ovatis conicis ; aculeis albidis, radialibus 8-10 rigidis 
subulatis rectis s. paullo recurvis, additis subinde ex summa areola aculeis ndvanititite 3-5 fasciculatis tenuioribus, 
centrali fone robustiore subulato recurvato, in plantis junioribus deficiente ; floribus magnis sulphureis intus basi 
rubicundis 
exas, from the Brazos to the Nueces rivers : fl. May. — Larger heads 2-2} inches in diameter; czespitose masses 
a foot or more large ; tubercles spreading, or in older flowering plants often somewhat adpressed and imbricate, 
7-9 lines long ; spines 4-8 lines long. Flower 2}-23 inches long, and of same diameter. Seedsaline long. —_ [268] 
§3. RUBRIFLORA, 
* Sepalis integerrimis. 
24. M. conorpEa, DC. (M. strobiliformis, E. in Wisl. Rep. non Scheer) : found only south of the Rio Grande. 
* * Sepalis fimbriatis. 
5. ? M. Portstr, Scheer: cylindrica, subramosa ; tuberculis ovatis obtusis levissime sulcatis, axillis scttaiia: 
nosis ; gain radialibus numerosissimis gracilibus — smeCone any 6-12 validioribus expansis basi nodulosis apice 
sphece sts floribus magnis e viridi rubellis ; baccis rose 
, on the Rio Grande, below Laredo, and from ee to Chihuahua. —I have not seen 1 this plant ; the de- 
eeu is i kes from Salm and Poselger. 
26. M. ruBERcuLosa, E. in B. C. R. : ovata s. ovato-cylindrica, simplex s. ad basin parce prolifera ; tuberculis 
e basi saiwraeas ovatis abbreviatis obtusis profunde sulcatis demum suberosis persistentibus confertis, axillis villosis- 
simis ; aculeis exterioribus 20-30 rigidis albidis, interioribus 5-9 robustioribus czsio-purpureis sphacelatis, superioribus 
longioribus cents, infimo breviore robusto porrecto s. deflexo ; floribus in vertice densissime tomentoso centralibus 
pollicaribus dilute roseis ; baccis elongato-ovatis rubris ; tg minimis scrobiculatis. 
On the mountains near E] Paso, and eastward : fl. May and June. Plant 2-5 inches high; tubercles 24-3 lines 
long, dry and hard, not fleshy unless very young, nor shrivelling when old, but losing the spines and covering the 
lower part of the plant like corky protuberances. Outer spines usually 2-4, rarely 5 or 6, lines long ; interior spines 
4-9 lines long ; those of the upper tubercles forming a tuft of grayish-purple color on top of the plant. Flowers 
very pale purple, one inch in diameter. Berry red, three fourths of an inch long, one fourth of an inch thick, crowned 
with the remains of the flower. Seeds short, thick, about half a line long. — The short, corky tubercles, with very 
deep grooves, and very woolly when young, together with the long red fruit, distinguish our species from all the 
allied forms. 
. M. pasyacantua, E. in B. C. R.: simplex, subglobosa ; tuberculis teretibus laxis leviter sulcatis; [269] 
axillis pabvillcais: aculeis aie” sesh setaceis patulis, exterioribus 25-35 albidis, interioribus 7-13 longi- 
oribus purpureo-fuscis, centrali infero equilongo; baccis centralibus ovatis ; seminibus obovato-globosis nigricantibus 
scrobiculatis. 
Paso and eastward. — Specimens before me are 14-24 inches high and a little less in diameter ; tubercles 
4-5 lines long ; spines more slender and soft than in the allied species, often capillary, spreading, but not radiating, 
6-12 lines long, only the lower exterior ones a little shorter. Seeds about half a line long. Very nearly allied to 
the next. 
28. M. vivapara, Haw.: simplex s. czspitosa ; tuberculis teretibus ee leviter sulcatis ; aculeis rectis rigidi 
exterioribus patentissime radiantibus albidis 12-36, centralibus 3-12 robustioribus longioribus obscurioribus, singulo 
robustiore porrecto deflexove, ceteris sursum divergentibus ; floribus ioianieenda purpureis magnis ; baccis sublate- 
ralibus ovatis viridibus ; seminibus obovatis scrobiculatis fulvis. 
ar. a. VERA: depresso-globosa, simplex s. plerumque prolifera, cespitosa ; aculeis radialibus 14-20, cen- 
tralibus 3-8. 
Var.? 8. RADIOSA: ovata s. subcylindrica, simplex 8. e basi ramosa ; aculeis radialibus 12-36, centralibus 3-12. 
