. Carnegie Institution of Washington publication. 222 THE CACTACEAE. 161 (7. Opuntia zebrina Small, Journ. N. Y. Bot. Card. 20: 35. 1919. (See page 155, ante.) Plant erect, more or less branched throughout, fully i meter tall or less, the roots fibrous, joints oval or obovate, thickish, mostly i to 2 dm. long, deep green, sometimes obscurely glau- cous; leaves ovoid, 2 to 3 mm. long, bright green; areloes scattered, some of them, usually the lower ones, unarmed, the upper ones irregularly armed; spines slender, solitary or 2, 3, or 4, together, red-brown, finely banded, nearly terete, closely
. Carnegie Institution of Washington publication. 222 THE CACTACEAE. 161 (7. Opuntia zebrina Small, Journ. N. Y. Bot. Card. 20: 35. 1919. (See page 155, ante.) Plant erect, more or less branched throughout, fully i meter tall or less, the roots fibrous, joints oval or obovate, thickish, mostly i to 2 dm. long, deep green, sometimes obscurely glau- cous; leaves ovoid, 2 to 3 mm. long, bright green; areloes scattered, some of them, usually the lower ones, unarmed, the upper ones irregularly armed; spines slender, solitary or 2, 3, or 4, together, red-brown, finely banded, nearly terete, closely spirally twisted; flowers few on a joint, or soli- tary; sepals deltoid to deltoid-reniform or nearly reniform; corolla yellow, rotate, 6 to 7 cm. wide; petals rather numerous, the inner ones broadly obovate, undulate, minutely mucronate or notched at the apex; berries obovoid, not constricted at the base, to cm. long, red-purple; seeds many, 6 to 7 mm. in 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 perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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