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Project Name Data (Last Modified On 9/24/2013)
 

Flora Data (Last Modified On 9/24/2013)
Genus AESCHYNOMENE L.
Contributor Michael 0. Dillon
PlaceOfPublication Sp. P1. 713. 1753.
Note TYPE: A. aspera L.
Synonym Gajati Rumph. ex Adans., Fam. P1. 2: 328. 1763. TYPE: A. aspera L. Macromiscus Turcz., Bull. Soc. Nat. Mosc. 19(2): 507. 1846. TYPE: M. brasiliensis Turcz. = A. montevidensis Vog. Ctenodon Baill., Adansonia 9: 236. 1870. TYPE: C. weddellianum = A. oroboides Benth. Climacorachis Hemsley & Rose, Contr. U.S. Nati. Herb. 8: 43. 1903. TYPE: C. mexicana Hemsley & Rose = A. villosa Poir. Secula Small, Fl. Miami 90, 200. 1913. TYPE: A. viscidula Michx. = A. oroboides Benth.
Description Herbs, shrubs, or small trees; stems terete, finely striate, unarmed. Leaves
Habit Herbs, shrubs, or small trees
Description alternate, subimparipinnate, 1-10 cm long; leaflets 5-80, alternate or subopposite, subsessile, 2-40 mm long, 1-20 mm wide, glabrous to sericeous, often minutely glandular-punctate, 1-several costate; petioles 2-40 mm long; stipules peltate, appendiculate below the point of attachment or attached at the base and not appendiculate, membranous or foliaceous, persistent or caducous. Inflores- cences racemose, paniculate, fasciculate, or rarely solitary, axillary or terminal, bracteate, bractlets paired and subtending calyxes, pedicels glabrous to pubes- cent, usually glandular. Flowers 5-15 mm long; calyx bilabiate to campanulate, commonly persistent; corolla yellowish to red or purple, petals usually clawed; stamens 10, essentially diadelphous, 5:5, filaments united into a sheath, open on carinal side, and with splitting on vexillar side delayed or merely incipient; anthers dorsifixed, or occasionally basifixed; pollen ellipsoidal, tricolpate; ovary 2-18 ovulate, rarely 1-ovulate, sessile or short stipitate; style incurved, not bearded; stigma terminal. Fruit a loment, (1-)2-18-articulate, subsessile to long stipitate, laterally compressed, occasionally torulose; seeds reniform, smooth, sublustrous, light brown to black, hilum circular, embryo axile, slightly bent, endosperm pres- ent, cotyledons fleshy. Chromosomes: n = 10.
Note composed of about 350 species
Distribution distributed throughout the warmer parts of the world. In the Western Hemisphere, its pre- sumed center of origin, some 70 species range from the mid-Atlantic states in the United States, west to Baja California, Mexico, throughout Central America, the Antilles and south to the Rio La Plata, Argentina.
Note Two American sections, Aes- chynomene and Ochopodium, are recognized by Rudd (1955), both with repre- sentative species in Panama. Most taxa appear to be of little economic importance; however, the pith from certain South American species is used for corks and for stropping knives and razors.
Common pega-pega
Reference Rudd, V. E. 1955. The American species of Aeschynomene. Contr. U.S. Natl. Herb. 32(1): 1-172.
Key a. Stipules peltate, appendiculate below the point of attachment; calyx bilabiate, the upper lip 2-merous, the lower lip 3-merous (section Aeschynomene). b. Leaflets with 2-several costae. c. Ovary glabrous to puberulent; fruit glabrous to puberulent and occasionally with scattered tuberculate based trichomes, less than 0.8 mm in length, sutures be- tween articulations well defined, usually more than 5-articulate ...... 1. A. americana cc. Ovary villous; fruit hispid with tuberculate based trichomes, 0.8-1.4 mm long, sutures not defined between articles, 5-articulate or less ...... 9. A. villosa bb. Leaflets with 1 central costa. d. Fruit blackening on drying; calyx lips entire to subentire. e. Stipe and basal article separated by a suture; fruits submoniliform with both margins crenate ...... 6a. A pratensis var. caribaea ee. Stipe and basal article continuous, not separated by a suture; fruits with one margin entire, the other entire or crenate ...... 8. A. sensitiva dd. Fruit and vegetative parts turning brown or straw colored on drying, or remaining green; calyx lips definitely indented. f. Leaflets usually denticulate or serrulate-ciliate, 10-20 mm long, 4-8 mm wide; plant generally hispid; fruit 5-7 mm wide, hispid at maturity, not muricate, both margins entire or nearly so ...... 3. A. ciliata ff. Leaflets entire, 5-7(-10) mm long, 1-2(-2.5) mm wide; plant generally gla- brous or sparsely hispid; fruit 4-5 mm broad, glabrous at maturity or with scattered trichomes 0.5 mm long, muricate, upper margin straight and lower margin crenate ...... 7. A. rudis aa. Stipules not produced below the point of attachment to stem; calyx campanulate with 5 subequal lobes; articles 2-3 mm in diameter (section Ochopodium). g. Fruit 2- or 3-articulate, the stipe 1-5 mm long. h. Fruit usually biarticulate; leaves and stems canescent ...... 5. A. histrix var. incana hh. Fruit 3-articulate; leaves pilose, stems hispid ...... 2. A. brasiliana gg. Fruit 4- to 9-articulate, stipe 8-15 mm long ...... 4. A. elegans
 
 
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