Home Flora of Panama (WFO)
Name Search
Markup OCR Documents
!Mitracarpus hirtus (L.) DC. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Project Name Data (Last Modified On 9/11/2013)
 

Flora Data (Last Modified On 9/11/2013)
Species Mitracarpus hirtus (L.) DC.
PlaceOfPublication Prodr. 4: 572. 1830.
Synonym Spermacoce hirta L., Sp. PI., ed. 2. 148. 1762. LECTOTYPE: ?Jamaica, Herb. Linnaeus (LINN 125.4, not seen; microfiche MO). Mitracarpus brevifolius Gray, P1. Wright. 2: 68. 1853. TYPE: M6xico, Wright 1120, not seen.
Description Herbs to 0.5 m tall, the stems simple or branched basally, angular, glabrescent to villose, the hairs white, weak. Leaves lanceolate or oblong, 5(-6) cm long, to 1.5 cm wide, deltoid to acute at the apex, attenuate acute at the base, the costa prominulous above, subprominent beneath, the lateral veins 3-4, often evanes- cent, arcuate, strongly ascending, chartaceous, usually concolorous, glabrous to pubescent above, the hairs short, stiff, scabridulous; petioles short or absent; stipules connate, adnate to petiole, each part crescentic or hemispherical, to 4 mm long, the terminal margin with 8-10 subulate setas as long as or slightly longer than the sheath. Inflorescences terminal and axillary, the flowers in sub- rotund heads, to 0.7 cm in diam., burrlike because of the persistent, stiff calycine lobes and bracteoles; bracteoles numerous, subulate or linear triangular, erect, shorter than the capsule. Flowers very small; hypanthium short, the calycine lobes 4, unequal, lanceolate or subulate, to 1.5 mm long, pellucid, thickly and scarious marginate, the margin with well spaced, subulate hairs, with several oblong glands aggregated below the middle; corolla white, the tube cylindrical, often turgid, ca. 1.8 mm long, the lobes 4, ca. 0.6 mm long, pubescent marginally; stamens 4, the anthers oblong rotund, ca. 0.45 mm long, glandular apiculate, sessile or attached near the mouth; stigmas 2, minute, often exserted. Fruit a circumscissile capsule, ca. 1 mm long (exclusive of persistent calyx), dehiscing uniformly to expose the seeds, the cap hairy, the seeds quadrangular, brown, pitted.
Habit Herbs
Distribution a common weed throughout tropical America and the West Indies but has been collected only sporadically in Panama.
Note It is naturalized in Asia and Malaysia. Steyermark (1972) has an elaborate discussion of the typ- ification of M. hirtus in his remarks on M. villosus (Sw.) C. & S.
Specimen BOCAS DEL TORO: Changuinola Valley, Dunlap 373 (F). CANAL ZONE: Albrook, Blum 449 (MO). Summit Gardens, Croat 6761 (MO). Ft. Kobbe, Duke 3962 (MO). Railroad 3 km W of Gamboa, Nee 9505 (MO). CHIRIQUf: Lava flow between El Hato and Bambito, D'Arcy 10041 (MO). COCLE: Boca del Toabre, confluence of Rfo Toabre and Rio Cocle del Norte, Lelvis et al. 5487 (MO). DARIEN: Rfo Mortf, 6 mi upstream from Mortf Abajo, Duke 10161 (MO). Rfo Tuquesa, lower Tuquesa mining company camp called Charco Chiva, Mori 6968 (MO). PANAMA: Isla Taboga, Allen 1273 (MO). Cerro Azul, Tyson 2067 (MO). VERAGUAS: 0.2 mi beyond fork in road at Escuela Agricola Alto Piedra, road to Rfo Calov6bora, 750 m, Croat & Folsom 33868 (MO).
 
 
© 2024 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110