105 
[ 26 ] 
cultivation., but have not seen as yet flowers or fruit from any of them; 
' still they cannot but belong to my genus Echinocereus, to judge from 
'fr analogy. 
Some Mammillariae of Oosihuiriachi are distinguished by their compact- 
shape; the tubercles are very short, globose, or even hemispherical, the 
spines strong, numerous, radiating, and adpressed, the fruits central from 
a woolly vertex: Mammillaria convpacta.. 32 Another, M. gummifera , 83 
belongs together with two species from Texas, and from the mouth of the 
Rio Grande to the section Angulares, with pyramidal 4 angled tubercles, 
,, and milky juice, which, hardening, forms a gum. A third species belongs 
i to Crinitae, and is a most elegant little plant with numerous hairlike radi- 
; ating and one stout, hooked central spine; I have named it M. barbata, 34 
% spines or bristles 1 to 2, lower about 4, and lateral 7 to 9 lines long; central 
spine much stouter, 1 inch long. 
8 * Mammillaria compacta , n. sp., simplex, hemisphaerica, s. depresso- 
| globosa; tuberculis abbreviate, ovoideo-conicis, sulcatis; areolis ovato-lan- 
ceolatis, junioribus amp-tomentosis; aculeis omnibus radialibus, 13-16 
subaequalibus, robustis, recurvatis, adpressis, intertextis, albidis, superiori- 
bus apice fuscis; sulcis tuberculorum axillisque junioribus et vertice tomen- 
tosis; floribus in vertice congestis; baccis ellipticis perigonio coronatis, 
. viridibus; seminibus obovatis, laevibus, fulvis*. 
i Oosihuiriachi.—Plant 2 to 3^ inches in diameter and 1\ to 2\ inches 
high; tubercles in 13 rows, 4 lines high, 6 lines wide at base; spines in¬ 
terlocking, and thereby often deformed and twisted, §tout, 7 to 10 lines 
long. 
3 3 Mammillaria gummifera , n. sp., laetiflua, simplex, hemisphaerica, 
- tuberculis quadrangulato-pyramidatis; axillis areolisque junioribus albo- 
I tomentosis; aculeis rectis, radialibus 10-12, inferioribus robustis, apice 
fuscis superiores setaceos aibidos ter superantibus; centralibus 1-2 robustis, 
brevibus, fuscis, porrectis. 
? Oosihuiriachi.—From 3 to 5 inches in diameter, 2\ to 4 inches high; % 
» when wounded it exudes a milky fluid, which, hardening, forms a trails- ^ 
W parent or whitish gum; tubercles mostly in 13 oblique rows, 6 to 7 lines 
long, and 5 to 6 lines wide at base; upper spines 2 to 3, lower 6 to 7, cen- 
tral about 2 lines long. Flowers and fruit not seen, but probably like 
those of two similar species, M. applanata , Engelm. ined., from the Pierde- 
nales, in Texas, ancl M. hemisphaerica , Engelm. ined., from the mouth 
of the Rio Grande; both are also simple, lactescent, with pyramidal tuber¬ 
cles, and both have small reddish white flowers, and long clayate scarlet 
I berries, without the remnants of the flower. It is a feet which I have 
repeatedly observed, and in a considerable number of species, that the redf 
if globose, or clavatejberries of the mammillariae are always destitute of the 
> remnants of the jrerigon, etc.; but th^oval|green fruits always are topped 
with it. 
0 34 Mammillaria barbata , n. sp., simplex, globoso-depressa; tuberculorum 
axillis nudis; aculeis radialibus numerosi^simis pluriserialibus, exterioribus 
. piliformibus albis sub-40; interioribus paulo robUstioribus fulvis 10-15, 
centrali singulo robusto, uncinato, fusco, erecto; baccis oblongis, viridibus, * 
apice floris rudimento coronatis. 
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