116 CACTEA OF PLANTZ LINDHEIMERIANA. 
Ill. CACTEZ OF ENGELMANN AND GRAY’S PLANTA LINDHEIMERIANS. 
Part i. 
OPUNTIA FRAGILIS, Nutt., var. FRUTESCENS. 
244 
thickets (vide No. 233), on the Colorado; o 
stem, covered with light gray bark, and sometimes with lichens, 
larger one (4-5 lines long) ; these disappear from the older stems. 
terete (or angular when withered), and bear the ultimate articulations, which are about an 
branches are green and t 
O. frutescens, Engelm. mss. 
n acquiring the height of 4 or 5 feet, with a branching ligneous 
From Boston JouRNAL OF NATURAL History, Vout. V. 1845. 
Near the Muskit- [245 (37)] 
It bears bunches of small capillary spines, with one 
The wood is hard and close-grained. The younger 
inch long, and very easily break off. These bear when young, like rE Opuntiz, short terete subulate leaves, with 
a single spine in their axils, and above this a bunch of small ones. 
with the obovate so scarlet ie which are about 8 lines siice , fleshy, but 
eds, is most remarkable, these fruits are often proliferous, and bear 
(2-5) white, compres 
specimens are not in flower, but are covered 
not juicy, and contain very few 
‘om 1 to 4 ord 
new hdkincles from the upper Sten of spines, The fruit either falls off with these branches, or ali dries up, 
persists, and finally forms part of the stem.} 
1 Mr. Lindheimer has sent seven other Cacti, 
mostly in living specimens, namely : — [246 (38)] 
1. OpuNTIA, sp.: without fruit or flower; probably O. vul- 
garis, It attains the height of several feet, with large obovate 
joints and a few spines. 
2. O. MissourrEensis? Perhaps 0. vulgaris, but very spiny. 
38. MAMILLARIA SIMILIS, n. s 
albidis, pointe, peut basi 
spa 
dustry. »Evidently near Jf. simplex, —at least to Nuttall’s 
plant of that name, — but czspitose, forming tufts often a 
foot in diameter. Flowers not seen rries scarlet, of the 
size of a large pea. numerous, subglobose, scrobiculate, 
black, with an elongated white hilum. I have living plants, 
but they have not pa flowered. 
4. M. suLcaTa, n. sp.: cespitosa ; tuberculis ovato- 
oblongis ne sib apicem versus prolifero superne exa- 
spinis rectis radiantib 
ersus cilia 
sordide flavis ad basin intus SNe in brevibus rubicun- 
dis ; stylo supra stamina ; stigmatibus 7-10 flavis; 
baccis setingfe ol virescentibus. —With the preceding. Flowers 
opening for two or three days, in direct sunshine, 2 inches or 
sepals, 
denticulate petals, ete. [This pretty species has diss payin 
in the Cambridge Botanic Garden.] 
5. ECHINOCACTUS SETISPINUS, n. subglobosus, apice 
85 ae pleramque 13 nentis subobliqus aculeis 
15-18 fi fuscis » Superiori- 
bus 3-5 elongatis, fi centralibus longissimis erectis, caeteri 
s minutis solita ariis e macula subtom entosa 
tis 
nutim tuberculatis. = Weasins on the Colorado 
River. Near E£. tonntapisinia, Link & Otto, from Brazil. 
Our specimens are about 2 inches in diameter and 14 inch 
high, with pretty sharp ribs separated by deep grooves. The 
longest apne are 15 lines long ; flowers about 5 lines long. 
. E,. LINDHEIMERI, n. sp.: hemispherico-depressus, ver- 
tice oa oso ; costis 21 verticalibus acutis subundulatis ; : 
eintbes 6-7 ineequalibus radiantibus subrectis centrali 
recurvata multo brevioribus ; floribus e vertice depresso to- 
mentoso ex axillis fasciculoram spinarum einndactitl pro- 
venientibus confertissimis; sepalis (80-100) in tubum brevem 
infundibuliformem Janosum coalitis lanceolatis 
spinoso-aristatis, interioribus mar gine here : eed (39)] 
petalis (4 0-50) Lineari- oblongis margine fimbria 
ifidis aristatis ; staminibus numerosissimis 
bus ; stigmate irregulariter 14-17-fido. — On deserted ant- 
hills, near the Colorado River. Often a foot in ee : 
our specimens are 8 or 9 inches in diameter and 4 or 5 i 
high. Spines strongly prone stout, the larger ones atten 
2inches long. Flowers about 2 inches in length, twelve or 
more aggregated in the woolly ea The petals at the base 
are scarlet, verging to orange, from which a pale purple cr 
violet midrib extends to the apex, and is prolonged into a 
delicate bristle of the same color, while the upper part of the 
tal is pearly white, with feathery margins. The flowers 
remain for three days, catia only in bright sunshine. 
. CEREUS CHSPITOSUS, n. sp.: ovato-globosus demum 
cylindricus, apice de een ambi licatus ; costis sub-15 e tu- 
b 
cem versus ciliato- gana a exterioribu 
lar reduced Cereus, quite —— and even 
occasionally, in the manner of Opuntia, beginnin 
when only 2 inches high, and oe pliee than Sa but 
aga the height of at least 6 inches ; the ribs from 12 to 
s in flower for two days; the flowers about 2 inches 
broad om fully expanded. Petals rose-purple. Filaments 
reddish at the base, yellow at the summit. 
