Monographs Details: Stigmaphyllon lingulatum (Poir.) Small
Authority: Britton, Nathaniel L. Flora Borinqueña.
Description:Species Description - The bright yellow flowers of this woody vine, which is common in the dry, southern and eastern parts of Porto Rico, and occasional along the northern coast, at low elevations, are conspicuous and attractive, most abundant during the winter; it also inhabits the small islands Mona, Desecheo, Cayo Icacos, Vieques and Culebra, ranging eastward through the Virgin Islands to Anegada, southward through the Lesser Antilles to St. Lucia, and occurs also in Jamaica, Haiti and Santo Domingo. Direct translation of the popular Spanish name is Parallax Vine; we suggest this for an English name. There are many kinds of vines of this family in tropical America, and their botanical classification is very difficult, both as regards genera and species; authors have reached many different conclusions. Under Stigmaphyllon there are 4 species recorded from Porto Rico; of these we illustrate and describe 2 in this work; the others are known, as Porto Rican, only from single specimens collected many years ago in the eastern part of the island. Stigmaphyllon (Greek, leafy stigma), a genus established by the French botanist Adrien de Jussieu in 1833, includes, perhaps, as many as 60 species of woody vines. They have opposite, stalked leaves, and bright yellow flowers in broad, axillary clusters. The calyx is 8-glandular and has 5 sepals which remain under the fruit and there are 5, erose or lacerate petals; there are 10 stamens, but usually only 6 of them bear anthers, and their filaments are united at the base, or sometimes up to the middle; the ovary is 3-lobed, and the 3 styles are sometimes leaf-like at the top. The fruits, usually 2 or 3 together, are 1-seeded, with a thin, flat, narrow, dorsal wing (samaras). Stigmaphyllon lingulatum (tongue-shaped) is a vine from 2 to 4 meters long, or sometimes longer, with hairy twigs. The oval or ovate, rounded or notched, netted-veined, nearly or quite smooth leaves are from 2.5 to 12 centimeters long, with stalks about 2 centimeters long, or shorter. The flowers are several or many in the clusters, with broad sepals 3 or 4 millimeters long, the petals 10 to 13 millimeters long. The samaras become 1.2 or 2 centimeters long. Another species, Stigmaphyllon tomentosum is also illustrated in this work.

Discussion:Bejuco de paralejo Parallax Vine Malpighia Family Triopteris lingulata Poiret, in Lamarck, Encyolopédie Méthodique Botanique 8: 104. 1808. Banisteria periplocifolia Desfontaines; De Candolle, Prodromus 1: 589. 1824. Stigmaphyllon periplocifolium A. Jussieu, Annales des Sciences Naturelles II. 13: 290. 1840. Stigmaphyllon lingulatum Small, North American Flora 25: 140. 1910.