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1. S. discolor Pursh, var. pDuMosA Watson. A diffuse pubescent shrub, 3 to 9 dm, 
high: leaves usually small, ovate, cuneate into a short margined petiole, nearly 
smooth above, often white tomentose beneath, pinnatifidly toothed or lobed: panicle 
somewhat diffuse and tomentose. (Holodiscus discolor, var. dumosa Maxim. )—Moun- 
tains west of the Pecos. 
4. PHYSOCARPUS Maxim. 
Diffuse shrubs, with palmately lobed leaves, corymbose flowers, and 
1 to 5 divergent inflated membranaceous dehiscent 2 to several-seeded 
carpels. 
1. P. monogyna. A small shrub: leaves ovate or often cordate, 3-lobed and 
toothed, sometimes densely white-tomentose beneath: flowers on short pedicels in 
simple umbel-like corymbs: ovaries densely tomentose and but 1 or 2. (Spirea 
monogyna Torr. Neillia Torreyi Watson, Physocarpus Torreyi Maxim. )—In the 
Guadalupe Mountains. 
5. RUBUS Tourn. (BRAMBLE.) 
Perennial herbs or somewhat shrubby, with prickly stems, compound 
leaves and serrate leaflets (in ours), a 5-parted calyx without bractlets, 
5 deciduous petals (usually white), numerous stamens, and numerous 
pistils becoming fleshy drupelets and crowded upon a spongy receptacle, 
forming an edible fruit. 
1. R. occidentalis L. (BLACK RASPBERRY. THIMBLEBERRY.) Glaucous all 
over: stems recurved, armed with hooked prickles, not bristly : leaflets 3 (rarely 5), 
ovate, pointed, coarsely and doubly serrate, whitened-downy underneath: petals 
shorter than the sepals: fruit separating in a mass from the dry oblong receptacle, 
hemispherical, purple-black.—A common northern raspberry, reported from Gillespie 
County (Jermy). 
2, R. trivialis Michx. (Low BUSH-BLACKBERRY.) Shrubby, procumbent, bristly 
and prickly: leaves evergreen, coriaceous, nearly glabrous; leaflets 3 (or pedately 
5), ovate-oblong or lanceolate, sharply serrate: petals large: fruit not separating 
from the juicy prolonged receptacle, blackish.—A southern blackberry, apparently 
common in eastern, southern, and western ‘Texas. 
6. CERCOCARPUS HBK. (MountTAIN MAHOGANY.) 
Small trees or shrubs, with simple entire or toothed evergreen leaves, 
small axillary and solitary flowers, calyx without bractlets, a long- 
cylindrical calyx-tube, no petals, and usually a solitary carpel which 
becomes a coriaceous linear terete villous fruit included in the enlarged 
calyx-tube and tailed with the elongated and plumose style. 
1. C. parvifolius Nutt. A shrub 6 to 30 dm. high (sometimes twice as high): 
leaves cuneate-obovate, coriaceous, serrate towards the obtuse or rounded summit, 
more or less silky above, densely hoary-tomentose beneath: flowers on short slender 
pedicels: limb of calyx with short teeth: tail of achene often 10 cm. long.—Moun- 
tains and bluffs west of the Pecos. Var. PAUCIDENTATUS Watson is a Mexican form 
extending into the mountains west of the Pecos, in which the leaves are smaller and 
entire, or sparingly toothed at summit. 
