. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. 2, Opuntia humifusa CACTACEAE. Vol. 11. Western Prickly Pear. Devil's Tongue. Fig. 2987. Cactus Jiiimifiisus Raf. Ann. Nat. 15- 1820. Opuntia humifusa Raf. Med. Bot. 2: 247. 1830. O. mcsacantha Raf.: Ser. Bull. Bot. Gen. 216. 1830. O. 7fa^H(?j(?»ii Engelm. Pac. R. R. Rep. 4: 41 1856. Prostrate, similar to the preceding specie:; joints obovate to siiborbicular, o
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. 2, Opuntia humifusa CACTACEAE. Vol. 11. Western Prickly Pear. Devil's Tongue. Fig. 2987. Cactus Jiiimifiisus Raf. Ann. Nat. 15- 1820. Opuntia humifusa Raf. Med. Bot. 2: 247. 1830. O. mcsacantha Raf.: Ser. Bull. Bot. Gen. 216. 1830. O. 7fa^H(?j(?»ii Engelm. Pac. R. R. Rep. 4: 41 1856. Prostrate, similar to the preceding specie:; joints obovate to siiborbicular, or oval, usually deep green, 2'-$' long; leaves subulate, spread- ing, 3"-5" long; bristles reddish brown; spines few, mostly near the margins of the joints. 1-4 together, whitish, or reddish at base and apex, deflexed, or the longer one spreading and i'-i' long; flowers yellow, often with a reddish centre, 2j'-34' broad; petals 10-12; fruit club-shaped, not spiny, fleshy, edible, iJ'-2' long. In dry sandy or rocky soil, Ohio to Minnesota. Kentucky. Missouri, Nebraska and Texas. Summer. Opuntia macrorhiza Engelm., a related species with a deep woody root, abundant in Texas, is re- ported to range northward into Missouri and Kansas. 3. Opuntia tortispina Engelm. Tvvisted-spined Cactus. Fig. 2988. Opuntia tortispina Engelm. Pac. R. R. Rep. 4: 21. 1856. Stems prostrate, the orbicular-obovate flattened joints 6'-8' long. Spines 3-5, yellowish, becoming whitish, angled and channeled, sometimes twisted, the longer ones li'-2*' long, with 2-4 more slender and shorter ones; flowers sulphur-yellow, 2i'-3' broad; fruit ovoid, fleshy, unarmed, about 2' long and l' in diameter; seeds orbicular, slightly notched at the hilum, 2"-3" wide. Plains of Missouri and Nebraska to Texas. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perf
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