Monographs Details: Dorstenia contrajerva L.
Authority: Berg, Cornelius C. 2001. Moreae, Artocarpeae, and (Moraceae): With introductions to the family and and with additions and corrections to Flora Neotropica Monograph 7. Fl. Neotrop. Monogr. 83: 1-346. (Published by NYBG Press)
Scientific Name:Dorstenia contrajerva L.
Synonyms:Dorstenia contrajerva var. houstonii (L.) Bureau, Dorstenia houstonii L., Dorstenia quadrangularis var. integrifolia Stokes, Dorstenia alexiteria L., Dorstenia quadrangularis var. sinuata Stokes, Dorstenia quadrangularis var. pinnatifida Stokes, Dorstenia palmata Willd. ex Schult., Dorstenia maculata Lem., Dorstenia contrajerva subsp. tenuiloba S.F.Blake, Dorstenia quadrangularis Stokes, Dorstenia contrajerva var. maculata (Lem.) Bureau, Dorstenia contrajerva var. tenuiloba (S.F.Blake) Standl. & Steyerm.
Description:Species Description - Herb, (sub)acaulescent; stem at least partly subterranean, 3-14 mm thick, puberulous to subglabrous; internodes usually short, sometimes to 2.5 cm long, in slender rhizomatous stems with all or some of the internodes long, the parts with short internodes ± tuberous. Leaves in spirals, rosulate or spaced; lamina broadly ovate to cordiform to subhastate, pinnately to subpalmately or subpedately, variously lobed to parted with 3-8 lobes at each side or subentire, 4-25 × 3.5-30 cm, chartaceous, sometimes variegated; apex (or apices) acute to subacuminate; base cordate to acute or often the lamina decurrent; margin crenate-dentate to subentire; upper surface hirtellous to subhirsute or strig(ill)ose, usually scabrous; lower surface mainly on the veins puberulous with patent to appresssed, uncinate, or straight hairs or also hispidulous, often scabridulous to scabrous; lateral veins 3-7 pairs, furcately branched, terminating in the margin; tertiary venation subscalariform to reticulate; petiole 3-20 cm long, puberulous with ± retrorse uncinate and straight hairs, or also hispidulous; stipules triangular to ovate, to 0.6 cm long, puberulous to hispidulous. Inflorescences green or with the margin purplish(-red); peduncle 530 cm long, densely to sparsely puberulous, mainly with ± retrorse uncinate hairs, or also hispidulous, the apex broadened into the receptacle; receptacle eccentrically attached, quadrangular to (or and) ± irregularly lobed in outline, (0.5-)1.5-3 cm diam., the outside puberulous, mainly with retrorse uncinate hairs, or also hispidulous, the fringe 0.5-2 mm broad, minutely puberulous; bracts in ca. 3 rows, on the margin, on the fringe, or also a few below the margin, appressed, semiorbicular to ovate, to 1(-1.5) mm long, puberulous to hispidulous; staminate flowers among the pistillate ones; tepals 2; with globose, conical and/or minute uncinate hairs, stamens 2; filaments as long as or (slightly) longer than the perianth; stigmas (almost) equal in length, 0.3-0.5 mm long, white. Endocarp body ca. 1.8-2 × 1.8-2 mm, tuberculate.

Discussion:The species is very variable in the dimensions of the whole plant, leaves, and inflorescences, in the length of the internodes, in the shape of the receptacle, and in the shape of the leaves, these varying from entire to variously incised. It was not possible to relate some of the variation clearly to certain habitats or regions. Some collections placed in D. drakena show features transitional to those of D. contrajerva.
Distribution:Mexico North America| Campeche Mexico North America| Chiapas Mexico North America| Chihuahua Mexico North America| Hidalgo Mexico North America| Jalisco Mexico North America| Puebla Mexico North America| San Luis Potosí Mexico North America| Oaxaca Mexico North America| Quintana Roo Mexico North America| Sonora Mexico North America| Tabasco Mexico North America| Veracruz Mexico North America| Yucatán Mexico North America| Guatemala Central America| Alta Verapaz Guatemala Central America| Chimaltenango Guatemala Central America| Chiquimula Guatemala Central America| Guatemala Guatemala Central America| Huehuetenango Guatemala Central America| Izabal Guatemala Central America| Jalapa Guatemala Central America| Petén Guatemala Central America| Quezaltenango Guatemala Central America| Retalhuleu Guatemala Central America| Sacatepéquez Guatemala Central America| San Marcos Guatemala Central America| Santa Rosa Guatemala Central America| Suchitepéquez Guatemala Central America| Belize Central America| Cayo Belize Central America| Corozal Belize Central America| Toledo Belize Central America| Cayo Belize Central America| El Salvador Central America| Honduras Central America| Atlántida Honduras Central America| Comayagua Honduras Central America| Copán Honduras Central America| Cortés Honduras Central America| Gracias a Dios Honduras Central America| Morazán El Salvador Central America| Olancho Honduras Central America| Santa Bárbara Honduras Central America| Yoro Honduras Central America| Costa Rica South America| Alajuela Costa Rica Central America| Cartago Costa Rica Central America| Guanacaste Costa Rica Central America| Heredia Costa Rica Central America| Limón Costa Rica Central America| Puntarenas Costa Rica Central America| San José Costa Rica Central America| Panama Central America| Bocas del Toro Panamá Central America| Chiriquí Panamá Central America| Coclé Panamá Central America| Colón Panama Central America| Darién Panamá Central America| Los Santos Panama Central America| Panamá Panama Central America| San Blás Panama Central America| Puerto Rico South America| Añasco Puerto Rico South America| Quebradillas Puerto Rico South America| Bayamón Puerto Rico South America| Saint Martin South America| Guadeloupe South America| Martinique South America| Grenada South America| Saint Vincent and the Grenadines South America| Colombia South America| Antioquia Colombia South America| Bolívar Colombia South America| Caldas Colombia South America| Chocó Colombia South America| Magdalena Colombia South America| Meta Colombia South America| Santander Colombia South America| Tolima Colombia South America|