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Opuntia robusta
NOPAL TAPON

Higher Taxonomy
Family: CactaceaeView DescriptionDichotomous Key

Common Name: CACTUS FAMILY
Habit: Perennial herb, shrub, tree, generally fleshy. Stem: cylindric to spheric, or flat; surface smooth, tubercled, or ribbed (grooved); nodal areoles bearing flowers. Leaf: generally 0 or early-deciduous, flat to +- cylindric. Spines: areoles generally with central, radial spines, occasionally with glochids. Flower: generally 1 per areole, bisexual [unisexual], sessile, radial [bilateral]; perianth parts generally many [5], scale-like to petal-like; stamens many; ovary inferior [superior], style 1, stigma lobes generally several [many]. Fruit: dry to fleshy or juicy, indehiscent to variously dehiscent, spiny, scaly, or naked; tubercled or smooth. Seed: generally many, occasionally 0--few.
Genera In Family: +- 125 genera, +- 1800 species: America (especially deserts), Africa; many cultivated, some edible. Note: Spines smaller, fewer (0) in shade forms; yellow spines blacken in age. Introduced species increasingly escape cultivation. Hybridization common in some genera. Taxa of Escobaria in TJM (1993) moved to Coryphantha.
eFlora Treatment Author: Bruce D. Parfitt, except as noted
Scientific Editor: Bruce D. Parfitt, Douglas H. Goldman, Bruce G. Baldwin, Thomas J. Rosatti.
Genus: OpuntiaView DescriptionDichotomous Key

Common Name: PRICKLY-PEAR
Habit: Shrub, tree; roots fibrous [tuberous]. Stem: generally erect, < 6 [12] m; segments generally flat (+- cylindric), generally firmly attached; tubercles 0 to +- developed; ribs 0. Leaf: small, conic, fleshy, deciduous, present on young stems, ovaries. Spines: 0--many per areole, cylindric or flat, tip smooth or barbed, epidermis persistent; glochids generally many. Fruit: juicy, fleshy or dry; wall thick, bearing areoles; spiny or not. Seed: in a bony, +- white aril.
Species In Genus: +- 150 species: America; Opuntia ficus-indica cultivated for food, others for ornamental. Etymology: (Possibly from Papago Indian name ("opun") for this food pl; or for a spiny plant of Opus, Greece) Note: Spines smaller, fewer in shade forms; yellow spines blacken in age. Spineless stems, ovaries, and fruit generally with glochids, these occasionally long, conspicuous; hybridization common. Taxa with cylindric to club-shaped stems moved to Cylindropuntia, Grusonia.
eFlora Treatment Author: Bruce D. Parfitt

Opuntia robusta H.L. Wendl. ex Pfeiff.
WAIF
Habit: Shrub, mound-shaped. Stem: generally < 2 m; proximal branches +- decumbent, distal spreading to ascending; segments massive, 30--44 cm, round, silvery-blue, glabrous. Spines: generally 1--2(5) in +- all areoles, longest 2.5(5) cm, +- straight, spreading from areole, chalky white with yellow core and base. Flower: inner perianth 4--5 cm, yellow; filaments white; style white, stigma white (or green). Fruit: 7--8 cm, juicy, deep purple-maroon; areoles 20--30. Seed: 4--6 mm.
Ecology: Uncommon in California. Disturbed sites, abandoned gardens; Elevation: 5--600 m. Bioregional Distribution: SCo; Distribution Outside California: Mexico. Flowering Time: Apr
eFlora Treatment Author: Bruce D. Parfitt
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Citation for this treatment: Bruce D. Parfitt 2017. Opuntia robusta, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=82013, accessed on March 27, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 27, 2017.


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