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Project Name Data (Last Modified On 10/7/2013)
 

Flora Data (Last Modified On 10/7/2013)
Genus Hiraea Jacq
Note TYPE: Hiraea reclinata Jacq.
Description Lianas, rarely shrubs or climbing shrubs. Leaves opposite, rarely ternate (not Panama), simple, entire, petiolate or subsessile, coriaceous, chartaceous, or papyraceous; stipules conspicuous, adnate to the petioles. Inflorescences of sim- ple, many-flowered umbels, or with the umbels arranged in cymose panicles; pedicels sessile, conspicuously bracteolate at the base. Flowers with the sepals ovate or ovate-oblong, 8-10, glandular or eglandular; petals clawed, yellow or white, rarely reddish (not Panama), generally glabrous, the limb suborbicular, obovate or ovate, concave, subentire, denticulate or shortly fimbriate, the fifth petal smaller, smooth, fimbriate or glandulose; stamens 10, somewhat unequal, glabrous, the filaments united at the base, the anthers ellipsoid or sometimes oblong; style glabrous with the apex truncate and the stigma lateral, erect, the apex scarcely thickened or more or less sigmoid with the apex dilated and the posterior angle apiculate, the ovary trilobate, hirsute. Fruit a schizocarp of 3 samaras, each with 2 lateral wings and a short dorsal ridge or crest, sometimes also with short appendages between the lateral wings and the dorsal crest, the lateral wings usually rounded or flabellate; cotyledons unequal, the outer 1 larger and enveloping the inner 1.
Habit Lianas, rarely shrubs or climbing shrubs.
Note Hiraea is a genus of approximately 40 species in the American tropics occur- ring especially in wet forests but also in dry areas. Most species are found at lower elevations but some range as high as 2,000 m.
Key a. Inflorescences simple, an axillary peduncle supporting a multiradiate umbella; indument on branchlets, main nerves of leaves; petioles, peduncles, and pedicels of appressed trichomes (sericeous or strigose); leaf blades medium size; wings of samaras rather large ...... 5. H. quapara aa. Inflorescences branched or occasionally simple; umbels containing 4 flowers. b. Indument on branchlets, inflorescences, and petioles densely and thickly tomentose, with straight rigid acute patulous branched trichomes; blades mostly more than 25 cm long, hirsute villous. c. Lateral wings of samaras membranaceous, obovate or subreniform, 12-18 mm long, 7-10 mm high ...... 3b. H. grandifolia var. parvifructa cc. Lateral wings of samaras thin-membranaceous, hyaline, depressed-ovate or sub- orbicular, 4.5-5.5 cm long, 2.5-3.2 cm high - 3a. H. grandifolia var. grandifolia bb. Indument on branchlets, inflorescences and petioles strigose, sericeous, pubescent, puberul-ous or glabrate; blades usually less than 20 cm long. d. Lower leaf surfaces appressed-sericeous throughout; wings of the samaras mem- braneous or rigid subcoriaceous; stipules close to the apex of the petiole. e. Lateral wings of the samaras subcoriaceous, cuneate-flabellate, small, 12- 15 x 9-12 mm; pedicels stout, thickening to the apex; leaf blades brownish sericeous abaxially ...... 2. H. faginea ee. Lateral wings of the samaras thin-membranaceous, subobovate, twice as large as the above, 25-30 x 20-25 mm; pedicels slender, not thickening toward the apex; leaf blades shining silvery sericeous abaxially ...... 4. H. papilionacea dd. Lower leaf surfaces with only the costa and main veins more or less densely appressed-sericeous, most of the surface puberulous or glabrous; wings of the samaras membranaceous; stipules borne near apex or near the middle of the petiole. f. Petiole with 2 subulate stipules close to the apex; leaf blades obovate, oblong or sublanceolate-elliptic, usually acuminate or apiculate at the apex, obtuse at the base; petals thick, carnose, orbicular at base, cordate, 4-6 mm long, the margin denticulate, the internal fimbriate-glandular; styles sericeous at base; lateral wings of samara suborbicular or reniform, 22-40 x 15-20 mm ...... 1. H. fagifolia ff. Petiole with 2 subulate stipules at the middle or below; leaf blades obovate or obovate-oblong, somewhat contracted above the base, the apex obtuse, rarely attenuate, the base obtuse, emarginate or cordate; petals membrana- ceous, 5-8 mm long, orbicular, denticulate or more or less fimbriate, the internal petal fimbriate, glandular; styles glabrous; lateral wings of samara 15-20 x 10-15 mm ...... 5. H. reclinata
 
 
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