204 CACTACEZ OF THE BOUNDARY. 
aculeolata demum nuda olivacea intus coccinea ; seminibus numerosissimis oblique obovatis dorso carinatis leviusculis 
(sub lente minutissime tuberculatis) lucidis exalbuminosis ; hilo oblongo subbasilari, embryone cotyledonibus foliaceis 
curvatis incumbentibus breviter hamato. (Tab. LX XIV. fig. 15.) 
a rocky cafion near the mountain pass of Bacuachi, Sonora (Thurber) ; on all the sierras of Sonora westward 
of the Sierra Madre, and more common southward (Schott), — called there Pitahaya. Flowers in June and July ; 
fruit in July and August. — Stems 5-15 from one root, fasciculated, erect or ascending, “curved inward,” 10-15 feet 
high, articulated ; low er joints 2-3, upper ones 5-6 feet long, 4-6 inches in diameter; ribs 13-14, very slightly promi- 
nent. The skeleton of this a according to Mr. Schott’s observations, consists oe flattened bundles of wood, very 
loosely connected by transverse fibre as to form a kind of hollow tube. Areolz pulvinate covered with eons 
or ashy wool, only about 3 lines in aadek 12-15 lines apart. Spines irregularly fasciculated, 7-10 according to 
Mr. Schott’s notes, but 15 in the flower-bearing bunches before me. (Might not the flower-bearing spines be more 
numerous and perhaps more slender than the others, indicating a transition to Pilocereus?) Spines slender, flexible 
almost setaceous, very unequal in length, 5-18 lines long in the same bunch, partly deciduous. Flowers usually 
6-12 inches below the top of the plant, ‘about 3 inches in length : ; ovary very densely imbricate with sepaloid scales, 
which bear dirty wool and often short bristly spines in their axils ; in some specimens they are wanting, in others 
they also invest the fruit, but are easily brushed off at maturity. Fruit 3 inches in diameter, like a large orange, of 
delicious taste, the crimson pulp dotted with numerous black seeds; these are 0.9-1.0 line long only, —a little larger 
an those of the last species, which they very much ebeatlsne~aud very minutely tuberculated. The seeds germi- 
nate like those of C. giganteus, with very cae acute cotyledons, and grow up with a globose head like the Echinoceret, 
while all the Zucerei which I have seen germinating at once grow up in a cylindric or prismatic column, 
Subgen. 4. Prnocerevs.? 
24. C. Scuorrir, sp. nov.: caulibus suberectis elatioribus fasciculatis articulatis 4-7- (plerumque 5-) 
costatis flavo-viridibus 5 ; areolis in caulibus sterilibns remotis aculeos radiales 4-6 robustos breves cinereos [45] 
ferentibus ; floribus in aculeorum barba pene occultis carneis ; tubo gracili eae ovarium globosum 10-squamatum 
constricto decurvo intus basi nudo sepalis 10-12 lanceolatis instructo ; petalis 10-12 oblongis obtusiusculis ; stig- 
matibus 5-6 fasciculatis ; bacca parva globosa squamosa pulposa coccinea mois ‘radimentis coronata ; seminibus 
oblique obovatis carinatis levissimis lucidis, hilo angusto subventrali; albumine parcissimo ; embryone hamato 
cotyledonibus curvatis foliaceis incumbentibus seu subinde obliquis. (Tab. LX XIV. fig. 16.) 
Sierra di Sonoyita, and southeast toward Santa Magdalena, Sonora, where it is named Zina, or Sina, or Sinita by 
the inhabitants (Schott). In August with flower and ripe fruit. — Stems 8-10 or more from the same base ; 8-10 feet 
high, ascending at base, and when full grown always curved outward at the top, the reverse of C. Thurberi. Often 
many plants together, forming thickets, and covering a large space of ground ; not rarely associated with the just- 
mentioned species. Stems of 2-4 articulations of 4 or 5 inches diameter ; lower part entirely denudated of the quite 
deciduous spines, Spines of the sterile joints, or young plants, 5-7, not over 3 or 4 lines long; areolw of the flowering 
joints 3 lines in diameter, covered with a dirty-whitish tomentum, 2-3 lines apart ; spines irregularly fasciculated, 
10-25 in number, and from 1 to 4 inches long, flexuous and penthutlctix Flower somewhat hidden in this reddish-gray 
beard, and its tube evidently bent downward by it; length of flower 13-13 inch ; sepals without any wool in the 
olivaceous, lower ones triangular, acute, upper ones lanceolate ; petals dirty fhests-color’ ; stamina comparativ ely 
few, leaving the top of the ovary and the lower part of the tube naked ; stigmata 5-6, filiform, broom-shaped, exactly 
like those of C. giganteus or CO. Thurberi. Berry scarlet, 3 or 4 lines in diameter. Seeds very similar to those of 
C. giganteus, but larger, 1.0-1.2 line long; germination very much like that of the last two species ; cotyledons of 
seedling plant acute, short, spreading ; head globose, but soon somewhat elongated, while both otpers remain globose 
for a long time. 
C. Schottit is closely allied to Pilocereus scoparius, Poselg., from Vera Cruz. This, however, is a larger plant, 
20-25 feet high, 1 foot in diameter, with 12-15 ribs on the sterile, and 20-25 on the flowering part. I have named 
this interesting species, the only Pilocereus of our Flora, after its zealous discoverer, whom I bave often had occasion 
to mention in these pages, and who, with all his other arduous duties in the field, still found leisure and inclination 
to study the Botany of the Boundary from the Pacific to the Gulf of Mexico. 
T Cereus Schottii, described in the text (evidently a Pilo- plant (the latter having more numerous, longer, and thinner, 
cereus, as that genus has been established by Lemaire), leaves often hair-like spines), and by the smaller flowers with 
no doubt in my mind about the propriety and necessity of a the parts reduced in number. The other characters ascribed 
reunion of the ‘‘ Old man Cactus” and its allies Me Cereus. to Pilocereus Citantenite from the whole surface of the tube, 
us, Pilocereus ee be characterized by the and even from the top of the ovary, and especially the short 
difference of the sterile and the flower-bearing parts of the and globose cotyledons) are not found in our species. 
