. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Doctor's Club 51^ and corky based conic prickles often over 5 cm. in diameter. The twigs are brown-hairy at first, becoming smooth, gray, and bear stout, sharp, brown broad-based prickles about 2 cm. long. The winter buds are short and blunt, dark brown. The leaves are de- ciduous, unequally pinnate, 2 to 3 dm. long, including the stout, often prickly stalk; leaflets 7 to 19, rarely as few as 3, ovate to lanceolate, 3 to
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Doctor's Club 51^ and corky based conic prickles often over 5 cm. in diameter. The twigs are brown-hairy at first, becoming smooth, gray, and bear stout, sharp, brown broad-based prickles about 2 cm. long. The winter buds are short and blunt, dark brown. The leaves are de- ciduous, unequally pinnate, 2 to 3 dm. long, including the stout, often prickly stalk; leaflets 7 to 19, rarely as few as 3, ovate to lanceolate, 3 to 7 cm. long, short-stalked or sessile, taper- pointed, shallowly toothed, abruptly narrowed at the base, the lateral ones unequal and sometimes curved; they are bright green and shining above, paler and sometimes slightly hairy be- neath. The flowers, appearing in the spring, are dioecious, in cymose pani- cles I to 2 dm. long, their calyx about I mm. long; petals 3 mm. long, con- cave, thickened and blunt at the apex; stamens longer than the petals, their. Fig. 526. — Southern Prickly Ash. filaments smooth. The fruit is in dense clusters, the capsules obliquely globose- obovoid, s to 6 mm. in diameter, rough, minutely tipped and brown; seed black, shining. The wood is rather soft, close-grained and light brown; its specific gravity is about The bark, together with that of the Northern prickly ash, Xanthoxy- lum americanum Miller, is oflBcial in the United States Pharmacopoeia imder the name of Xanthoxylum, but most of that found in commerce is obtained from this southern species. 4. DOCTOR'S CLUB—Xanthoxylum coriacemn A. Richard Tohinia emarginata Grisebach. Fagara coriacea Krug and Urban Also called Hercules' Club, this is a spiny shrub or small tree growing in south- ern peninsular Florida and the adjacent Keys, the Bahamas and many other islands of the West Indies. It reaches a maximum height of about 7 meters, but is usually much smaller. The trunk is usually flut
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