CACTACER. 29 
4 
Junioribus albo-villosis mox denudatis*; aculeis 12-18 radialibus brevibus pectinatis rigidis, 
adjectis plerumque supra aculeis adventitiis 2-6 brevioribus setaceis, lateralibus longioribus, 
inferioribus purpureis demum fuscis, superioribus plerumque albidis, rarius omnibus purpureis; 
aculeis centralibus nullis seu rare singulo robusto recto vel subinde curvato apice seu toto pur- 
pureo-fusco, rarissime altero graciliore superiore adjecto; floribus versus apicem lateralibus e 
flavo virescentibus; ovario tuboque pulvillos 25-30 (aculeolis infra 8-12, supra 3-5 albidis 
seu rubellis munitos) gerentibus; sepalis interioribus lineari-oblongis 10-15 virescentibus 
fuscatis ; petalis 12-15 lineari-oblongis acutiusculis ; baccis ellipticis virescentibus ; seminibus 
parvis obovato-subglobosis tuberculatis, hilo basilari suborbiculato. (Tab. XXXVI.) 
On the Limpia, and thence towards El Paso, Wright: fl. in May.—This is a taller form 
than the original species described in Wislizenus’ Report, from the northern parts of New 
Mexico, with stouter spines and acute petals. A handsome plant, not so much on account of 
the inconspicuous flowers, as from the beauty of the purple and white spines, which are 
particularly bright when first developed in spring, and look like flowers. Stems 3-6 and 
sometimes even 8 inches high, 1-2 inches in diameter; spines usually 3-5 or nearly 6 lines 
long ; central spines, if present, 6-10 lines in length, more common on the smaller northern 
var, a., rarely present in the southern form. In a single specimen collected by Dr, Bigelow on 
the upper Pecos, I find on some of the areolw all or most of the spines purple, and the 
central spine sometimes curved upwards, sometimes white, with a purple tip, or purple to the 
base. Flower one inch or less below the top, 1-1} inch long, not quite as wide even when 
fully open ; petals 2-3 lines wide. Fruit 5-6 lines long, crowned with the withered corolla, 
as in all Lchinocerei; in some rather dry fruits the corolla is quite persistent ; in the more juicy 
ones it, as well as the spines on the, fruit, are deciduous when the fruit is quite ripe. Seed 
0.5-0.6 line long, tuberculated, but the tubercles somewhat confluent, very slightly in the north- 
ern form, a little more in ours, so as to show pits between the warts; seed somewhat com- 
pressed, and keeled on the back. sth 
2. C. CHLORANTHUS (sp. nov.): cylindricus, simplex seu e basi parce ramosus; costis 13-18 
subinterruptis ; areolis confertis orbiculato-ovatis ; aculeis 12-20 laxius radiantibus setiformi- 
bus albis, lateralibus longioribus apice seepe purpurascentibus, adjectis supra aculeolis 5-10 
brevioribus setaceis ; aculeis centralibus 3-5 quorum 2 superiores breviores plerumque purpu- 
rascentes sursum divergentes, 1-3 inferiores longiores divergentes deflexique albidi; floribus 
in caule medio vel inferiore lateralibus virescentibus extus rufis; ovario pulvillos sub-21 (acu- 
leolis 14-18 setaceis munitos) gerente; sepalis tubi sub-18 lineari-lanceolatis, inferioribus 
aculeolos axillares 3-5 gerentibus; petalis 15-18 lineari-oblongis mucronatis ; filamentis sty- 
loque sulphureis ; stigmatibus 8-11 viridibus adpressis; bacca subglobosa aculeolata ; semini- 
bus parvulis tuberculato-scorbiculatis. (Tab. XXXVII—XXXVIII.) | 
Common on stony hills and mountain sides near El Paso, Wright, Bigelow, : fl. April.— 
Stems 3-9 or 10 inches high, 13-2 inches in diameter; areole -3 or 4 lines apart, not so 
much elongated as in the last speciés, and often almost orbicular ; radial spines slender, patu- 
lous, not strictly radiating, pectinate or adpressed to the plant; lower lateral ones the long- 
est, as in all these Pectinati, 4-5 lines long, inferior ones shorter, upper ones shortest ; no 
_ * This tomentum or villus on the young or nascent areola is so universally present, always disappearing with age, that it 
ceases to be ac . The differences consist only in the greater density or looseness of this tomentum, and in its color, 
which is almost always white, but occasionally yellowish, gray, tawny, brown, or almost black. I shall only make mention of 
it where it varies from the ordinary form. 
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