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Project Name Data (Last Modified On 8/5/2013)

Flora Data (Last Modified On 8/5/2013)
Genus Alloplectus Mart.
PlaceOfPublication Nov. Gen. 3: 53. 1829.
Note TYPE: A. sparsiflorus Mart., con- served name and type
Synonym Crantzia Scop., Intr. 173. 1777. TYPE: Besleria cristata L. = Alloplectus cristatus (L.) Mart. Lophia Desv., in Hamilton, Prodr. PI. Indiae Occid. 47. 1825, illegitimate name for Crantzia Scop. TYPE: L. phoenicia Desv. ex Hamilton, illegitimate name for Besleria cristata L. = Alloplectus cristatus (L.) Mart. This content downloaded from on Fri, 19 Jul 2013 10:27:36 AMAll use subject to JSTOR Terms and Conditions794 ANNALS OF THE MISSOURI BOTANICAL GARDEN [VOL. 65 Lophalix Rafin., Sylva Tell. 70. 1838. TYPE: L. bicolor Rafin., illegitimate name for Besleria cristata L. = Alloplectus cristatus (L.) Mart. Heintzia Karst., Auswahl. Gewachse Venezuela 34. 1848. TYPE: H. tigrina Karst. = Alloplec- tus tigrinus (Karst.) Hanst. Glossoloma Hanst., Linnaea 26: 191, 208, 209. 1854. TYPE: G. tetragona Hanst. = Alloplec- tus tetragonus (Hanst.) Hanst. Prionoplectus Oerst., Cent. Gesn. 45. 1858. LECTOTYPE: Prionoplectus cristatus (L.) Oerst. = Alloplectus cristatus (L.) Mart.
Description Shrubs or coarse herbs, terrestrial or epiphytic; roots fibrous; stems erect or clambering, quadrangular. Leaves opposite, usually equal in a pair, often long petiolate, elliptic to ovate or oblanceolate, entire to serrate. Flowers 1 to few in fascicles, axillary, bracteate, the peduncles not evident; calyx usually colored or green, the 5 lobes nearly free, often broad, entire to strongly serrate, pubescent to pilose; corolla tubular, yellow or red, oblique in the calyx, constricted or not in the throat, or laterally compressed, gibbous at the base with a spur, often ventricose below the mouth, the 5 lobes of the limb usually small; stamens 4, not exserted, the filaments adnate to the base of the corolla tube, the anthers often transversely oblong, coherent or becoming free, dihiscing by longitudinal slits; disc gland large, sometimes 2-lobed; ovary superior, the apex pilose, the style included. Fruit a fleshy bivalved capsule surrounded by the persistent calyx; seeds numerous, striate.
Habit Shrubs or coarse herbs
Distribution Alloplectus is a genus of about 60 species distributed mainly in northern South America.
Note The plants usually occur in rain or cloud forests as terrestrials or epiphytes, and appear quite commonly at forest margins. A few species are cultivated, but are not particularly ornamental. When Oersted described Prionoplectus in 1858, he included 3 species, and did not single out one as a type species. Of the two combinations Oersted made in the genus, Prionoplectus cristatus (L.) Oerst. is here selected as the lectotype for the genus. In the original publication of Alloplectus Martius included several species. One of these, A. sparsiflorus, was chosen to lectotypify the genus when Al- loplectus was included in the list of conserved names in the International Code of Botanical Nomenclature. More recently Wiehler (1972) included Alloplectus sparsiflorus in the genus Nematanthus Schrader as a synonym of N. hirtellus (Schott) Wiehler on the basis of leaf characters and cytology. Thus it might appear that Alloplectus and Nematanthus are synonymous which they are not. Nematanthus, which was described in 1821, is a distinct genus occurring in south- eastern Brasil and is not known in Panama. When a new lectotypification is made for Alloplectus the distinctiveness of the two genera will be clarified. The generic name is derived from the Greek words for "other" and "fold," and refers to the often recurved calyx lobe margins.
Reference Morley, B. D. 1974. A Revision of the Caribbean species in the genera Columnea L. and Alloplectus Mart. (Gesneriaceae). Proc. Roy. Irish Acad. 74(B)24: 411-438. Morton, C. V. 1944. Taxonornic studies of tropical American plants. Contr. U.S. Natl. Herb. 29: 1-19. Stearn, W. T. 1969. The Jamaican species of Columnea and Alloplectus. Bull. Brit. Mus. Nat. Hist. (Bot.) 4: 181-236. Wiehler, H. 1971 [1972]. Name changes for some American Gesneriaceae in cultivation. Baileya 18: 133-137. Wiehler, H. 1973. One hundred transfers from Alloplectus and Columnea (Ges- neriaceae). Phytologia 27: 309-329.
Key a. Leaves entire, glabrous above; calyx lobes crenulate to entire, 3-7 mm long, 2-3 mm wide; corolla 1.2-2.1 cm long ...... 5. A. pycnosuzygius aa. Leaves denticulate, serrate or serrulate, pilose, pilosulus, or strigillose above; calyx lobes strongly serrate, dentate, or fimbriate, at least toward apex, 0.8-3.5 cm long, 5 mm or more broad, usually longer and much wider. b. Stem epidermis peeling off in scales: leaves strongly veined below; corolla constricted at limb, 1.5-2.3 cm long ...... 2. A. ichthyoderma bb. Stem epidermis not peeling off in scales; leaves strongly veined or not; if corolla constricted at limb, then leaves not strongly veined below. c. Corolla constricted at limb, to 3.0 cm long; internodes red spotted. d. Calyx lobes serrulate, 8-10 mm long; corollas to 1.2 cm long, puberulent; ovary puberulent ...... 1. A. ambonensis dd. Calyx lobes fimbriate, to 2 cm long; corollas to 2.9 cm long, densely pilose; ovary densely pilose ...... 3. A. medusaeuts cc. Corolla ampliate toward limb, 3.5-5.0 cm long; internodes not red spotted. e. Calyx lobes broadly orbicular ovate, more than 10 mm wide; leaf bases cuneate to narrowly acute ...... 6. A. tetragonus ee. Calyx lobes oblong, 10 mm wide or less; leaf blades acute, bases rounded, or truncate ...... 4. A. panarnensis
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