|
(Last Modified On 6/18/2013)
|
|
|
|
(Last Modified On 6/18/2013)
|
|
Species
|
Dyssodia montana (Benth.) A. Gray
|
|
PlaceOfPublication
|
Proc. Amer. Acad. Arts 19: 38. 1883.
|
|
Synonym
|
Clomenocoma montana Benth., P1. Hartw. 86. 1841. TYPE: Guatemala, in mountains of Aceytuno, near Guatemala, Hartweg 592 (K, holotype, not seen; LE, NY, P, isotypes, not seen). Comaclinium aurantiacum Scheidw. & Planch., Fl. Serres 8: 19. 1852. TYPE: not seen. Tithonia splendens Planch., Fl. Serres 8: 19. 1852, pro syn. Dyssodia integrifolia A. Gray, Proc. Amer. Acad. Arts 19: 37. 1883. TYPE: Mexico, Chiapas. along streams in the mountains, 1864-1870, Ghiesbrecht 784 (GH, holotype, not seen). Gymnolaena integrifolia (A. Gray) Rydb., N. Amer. Flora 34: 161. 1915.
|
|
Description
|
Perennial herbs, 0.3-2 m tall, arising from a woody caudex with thick fascicled roots; stems puberulent, at least above, stramineous to purplish, striate, sparingly branched. Leaves opposite, simple or rarely trifoliate, 2-10 cm long, sessile, or with winged petioles up to 1.5 cm long, narrowly to broadly lanceolate, elliptic, or ovate, apically acute to acuminate, basally rounded to cuneate, serrate, crenate or subentire, usually basally ciliate with 1-3 pairs of bristles or aristate lobes 2-8 mm long, pinnately veined, glabrous to densely puberulent on one or both surfaces, especially toward the base, conspicuously punctate on both surfaces with round, black oil glands. Inflorescence few-headed; peduncles terminal, 10-20 cm long, puberulent; bracteoles alternate, scattered, slender, 0.5-1 cm long, puberulent, usually punctate. Heads radiate; involucres hemispherical, 2-4 cm diam., the principal involucral bracts in 2 series, subequal, 1-1.4 cm long, distinct, oblong to obovate, broadly rounded and erose above, more-or-less indurate-keeled below, punctate with slender, elongate black oil glands, subtended by a graduated series of smaller, more slender bracts; receptacle rounded, fimbrillate with slender, aristate-tipped paleas 5-7 mm long; ray florets bright orange, conspicuous, the tubes slender, puberulent, 5-8 mm long, the limbs broadly ovate, 10-15 mm long, dark-purple veined; disc florets orange, 50-100, the corollas slender, 8-10 mm long, puberulent below, the limb glabrous, the lobes slender, ca. 3 mm long, the anthers ca. 3 mm long, the style branches ca. 2 mm long, slender, with short conic appendages. Achenes turbinate, 2-3 mm long, densely strigose; carpopodium conspicuous, knoblike; pappus of 30-40 scabrid bristles 3-7 mm long.
|
|
Habit
|
herbs
|
|
Note
|
Dyssodia montana, with its large, orange heads and its simple, serrate leaves is distinctive. The leaf bases of this and a few related species bear elongate setiform lobes similar to those found in Pectis and in some species of Tagetes. This is another of the numerous characters which unite members of the tribe Tageteae.
|
|
Distribution
|
The range of D. montana extends from southern Mexico south through Central America into Panama. In Panama, this species occurs in a broad range of altitudinal zones on the Pacific slope from Chiriqui to central Panamak.
|
|
Note
|
It flowers from November to February.
|
|
Specimen
|
CANAL ZONE: El Valle, Harvey 5162, 5178 (both F). CHIRIQUI: Cerro Vaca, 900-1136 mn, Pittier 5313 (US). Valley of upper Rio Chiriqui Viejo, White & White 101 (MO). COCLE: S of El Valle de Anton, 600-800 m, Allen 2769 (1GH, MO, US), 4209 (MO). El Valle de Anton, Croat 13283 (MO); Hunter & Allen 373 (MO). El Valle, Lewis -et al. 2586 (MO). Vic. of Ola, 100-350 m, Pittier 5079 (GH, NY, US). Vic. of El Valle, White & White 74 (MO). LOS SANTOS: 12 mi S of Macaracas, Tyson & Blum 3065 (MO). PANAMA: Beyond Goofy Lake on road to Cerro Jefe, Correa & Dressler 454 (MO). Between Cerro Jefe and Cerro Azul, Croat 13063 (MO). Cerro Jefe, 3100 ft, Dwyer & Gentry 9433 (NY). Without locality, Hunter s.n. (MO, UC). Road to Cerro Campana, 700( ft, Tyson 6432 (MO, FSU). PROVINCE UNKNOWN: Duke 6176 (MO).
|
|
Tag
|
|
|
|
Project Name
|
|
Tag
|
|
|
|