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(Last Modified On 4/2/2013)
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(Last Modified On 4/2/2013)
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Genus
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Pouteria Aublet
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PlaceOfPublication
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Hist. PI. Gui. Fr. 85, pl. 33, 1775.
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Description
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Trees or occasionally shrubs, lacking spines. Leaves alternate or sometimes subopposite; blades membranous or coriaceous, the primary lateral veins strongly arcuate near the margin, not crowded, the secondary laterals often ? perpendicu- lar to the primary laterals (at least toward the margin), occasionally irregular. Flowers white to yellow or green, pedicellate or sessile, the fascicles axillary to leaves or leaf-scars; sepals 4-12, uniseriate or biseriate (always 2 + 2); corolla cylindric to subrotate, the lobes 4-6(-7), lacking appendages; staminodes petaloid or more often not petaloid (lance-filiform, linear or small and inconspicuous); staminal filaments attached at or near the top of the corolla-tube, less frequently at the middle or near the base (virtually free); ovary pubescent, (1-)4 to 10- loculed, the ovules attached laterally. Fruit fleshy or woody or gall-like! seeds 1-several, lacking endosperm, the scar lateral, exceeding the middle of the seed, often broad.
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Habit
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Trees shrubs
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Distribution
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About 40 species occur in North America; 15 species, as recognized in this treatment, are found in Panama.
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Reference
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Cronquist, A. Studies in the Sapotaceae, II. Survey of the North American genera. Lloydia 9: 241-292, 1946 (Pouteria p. 257-'2 92)).
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Key
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a. Sepals 4-7 [unknown in P. lucentifolia but presumably so]. b. Flowers obviously pedicellate (the majority of the pedicels more than 2 mm long). c. Leaf-blades sericeous beneath. d. Pubescence pale; corolla-lobes fringed-ciliolate; staminal filaments attached at the middle of the corolla-tube ......... 1. P. euryphylla dd. Pubescence rufous; corolla-lobes not ciliolate; staminal filaments attached at the level of the sinuses ........... 2. P. calistophiylla cc. Leaf-blades glabrous or pubescent only on the main veins beneath. e. Sepals 2-3 mm long. f. Reticulation of leaf-blades coarse; fruit 5-seeded, 4-5 cm broad; seed scar 1.5-2 mm broad ..................................... 3. P. lucentifolia ff. Reticulation of leaf-blades fine; fruit 1-seeded, less than 2 cm broad; seed scar 8-10 mm broad ........................................... 4. P. stipitata ee. Sepals 4-12 mm long. g. Secondary lateral veins without specific orientation (irregularly anastomosing); sepals 4; corola glabrous externally ...... 5. P. dominigensis gg. Secondary laterals ? perpendicular to the primary laterals and parallel to each other; sepals (4)5-6; corolla sparsely sericeous- strigose externally ..................................... 6. P. campechiana bb. Flowers sessile or subsessile (the majority of the pedicels less than 2 mm long). h. Sepals 5; corolla-tube shorter than the corolla-lobes. i. Petioles 6-17 mm long; secondary lateral veins irregularly an- astomosing, rather coarse; outer sepals ovate, the inner oblong- spatulate; corolla tubular or campanulate; ovary 4-locular ...... 7. P. chiricana ii. Petioles 15-33 mm long; secondary laterals fine, close, regularly disposed (though sinuous); all sepals ovate; corolla subrotate; ovary 5-locular ........................................ 8. P. subrotata hh. Sepals 4, 6 or 7; corolla-tube exceeding the corolla-lobes [unknown in P. sambuensis]. j. Sepals 6-7; corolla-lobes 5; staminal filaments attached at the top of the corolla-tube; fruit pyriform or obovoid ......... 9. P. sclerocarpa jj. Sepals and corolla-lobes 4; staminal filaments attached at the middle or base of the corolla-tube; fruit oblate-spheroid to ellipsoid [only sepal characters known for P. sambuensis]. k. Fruit conspicuously hairy ................................ 10. P. sambuensis kk. Fruit glabrous. 1. Leaf-blades finely appressed-sericeous below (sometimes glabrate in age); outer sepals ovate and finely rufescent, the inner rather narrowly oblong-spatulate; corolla 2.5-3 mm long; staminal filaments attached at the base of the corolla- tube ..................................... 11. P. stillosa 11. Leaf-blades glabrate; sepals all + ovate, the outer soon glabrate; corolla 4.5-8 mm long; staminal filaments at- tachcd at the middle of the corolla-tube or slightly below . ........................................................ 12 . P . cainito aa. Sepals 8-12 or more. m. Secondary lateral veins mostly perpendicular to the primary laterals, decidedly more prominent than the fine reticulum; sepals conspicuously appressed-pubescent on the back; fruit fleshy. n. Primary lateral veins 20-50 pair; sepals (at least some) ernarginate or more deeply bibbed at the apex; fruit ellipsoid to ovoid or sub- globosa, brown, mealy-roughened ............................. 13. P. sapota nn. Primary laterals 12-20 pair; sepals entire or scarcely emarginate; fruit obovoid, yellowish-green, the surface irregularly wrinkled (at least in herbarium specimens) and also mealy roughened ........ 14. P. fossicola mm. Secondary laterals rather irregularly disposed, scarcely more prominent than the coarse reticulum; sepals glabrous; fruit woody .................... 15. P. cooperi
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