208 Plante Lindheimeriane. 
obovatis planiusculis; pulvillis remotis ad margines conferti- 
oribus griseo-tomentosis setis flavidis aculeisque paucis com- 
pressis ancipitibus instructis, 1 — 4 validis seepe ineequalibus 
plus minus deflexis varie divergentibus basi rufis, ceterum 
stramineis cum adventitio infimo graciliore albido sæpe defi- 
ciente; fl.... bacca ovata subglobosa late umbilicata pulvil- 
lis pluribus tomentosis stipata; seminibus minoribus anguste 
marginatis. — From El Paso to Chihuahua, indigenous and 
cultivated, Dr. Wislizenus. No doubt, also, on the Texan 
side of the Rio del Norte. — Erect, 5—6 feet high. Upper and 
larger older joints 12 inches long by 9 broad. Areole 13-2 
inches distant: bristles 2—6 lines long: spines 1 — 13 inches 
long, very stout. Fruit 1:— 1; inches long, about 1: in diam- 
eter; umbilicus large, (10 — 12 lines) flat; pulvilli on the fruit 
about 5 lines distant. Seeds very numerous, about half as 
large in O. vulgaris, 11— 1j lines in diameter, of an irregular 
shape. — Near O. Dillenii and O. polyantha, as Prince Salm 
informs me. ` 
$23. Cylindrice. 
O. rrutescens, Engelm. in Pl. Lindh. I. c. under O. 
fragilis, from which it widely differs, stands near O. gracilis, 
Salm. (raised from Mexican seeds), but is sufficiently distinct. 
(Salm.) Fruit by the abortion of the seeds very often sterile. 
— I had occasion to observe this species in blossom, and add 
the description of the flowers : : 
Floribus ex ramis anni prioris provenientibus ; ovario clavato 
basi 5-gono sepalis subulatis sub-13 stipato ; sepalis interiori- 
bus 8 lanceolatis ex viridi sulphureis; petalis 8 obovato-lan- 
ceolatis cuspidatis (sulphureis s. subvirescentibus) ; staminibus 
numerosis (40 —50) inequalibus (externis majoribus) ; stylo 
exserto; stigmatibus 5 adpressis albidis. — The flower cannot 
be distinguished from that of the Opuntie applanate, but it is 
only 8—10 lines in diameter: ovary 9-12 lines long. 
Flowers (in St. Louis) July and August. ; 
O. arsorescens, Engelm. in Wisl. Rep., is recognized by 
Prince Salm as identical with his O. stellata; but as no de- 
