Montanoa leucantha subsp. arborescens (DC.) V.A.Funk

  • Authority

    Funk, Victoria A. 1982. The systematics of Montanoa (Asteraceae, Heliantheae). Mem. New York Bot. Gard. 36: 1-133.

  • Family

    Asteraceae

  • Scientific Name

    Montanoa leucantha subsp. arborescens (DC.) V.A.Funk

  • Description

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    Subspecies Description - Flowering (and Fruiting) Period: October-November (November-December), in the center of its range, but the reproductive cycle begins earlier (September) in the northern part of the range and later (late November) in the southern part of the range.

  • Discussion

    Montanoa arborescens DC., Prodr. 5: 566. 1836, as “Montagnaea.” Type: MEXICO, Cordilliere de Guchilaque, Aug 1827, J. L. Berlandier 1006 (lectotype chosen from four syntypes, G-DC, photo IDC 800. 565:111.4 top!; isolectotypes, FI! G! P!; photo of P isolectotype, F! MO! US!). This syntype was selected because it has the most collection information, the largest number of specimens at various herbaria and because it was the only one specified by number in the protologue. Other syntypes are: L. Alamán s.n., 1831; L. Alamán s.n.; and Mairet 59. Montagnaea clematidea Walpers, Linnaea 14: 308. 1840. Type: MEXICO, locality unknown, s.d., W. F. Karwinski s.n. (holotype LE, not seen; isotype, KIEL!). Karwinski’s original herbarium is deposited at LE (Holmgren and Keuken, 1974), but the specimen was not present in the loan from that institution. Eriocoma clematidea (Walpers) Kuntze, Rev. Gen. Pl. 1: 336. 1891. Montanoa uncinata Schultz Bip. in K. Koch, Wochenschr. Vereines Beförd. Gartenbaues Königl. Preuss. Staaten 7: 406. 1864. Type: MEXICO, Cumbre de Estepa, Sep 1842, F. M. Liebmann 484 [Liebm. Pl. Mex. 9056] (holotype, P!; isotypes, C[4]! G! K! P!; photo of holotype, OS!; photos of C isotype, F! MO! NY! US!; tracing of C isotype, GH!). Eriocoma uncinata (Schultz Bip. in K. Koch) Kuntze, Rev. Gen. Pl. 1: 336. 1891. Montanoa patens A. Gray, Proc. Amer. Acad. Arts 21: 388. 1886. Type: MEXICO, Chihuahua, mountains above Batopilas, Aug-Nov 1885, E. Palmer 164 (holotype, GH!; isotypes, BM! G[2]! GH! K! LE! NY[2]!; photo of K isotype, OS!). Polymnia nervata M. E. Jones, Contr. W. Bot. 12: 44. 1908. Type: MEXICO, Chihuahua, Gua-yanopa Canyon, Sierra Madre Mts., 24 Sep 1903, 3600 ft, M. E. Jones s.n. [acc. #40414] (lectotype chosen from two syntypes with identical information, POM!; isolectotype, POM!). This subspecies is one of the few taxa in Montanoa found growing sympatrically with another taxon: Montanoa leucantha subsp. arborescens is found in at least one area in Oaxaca growing with M. tomentosa subsp. tomentosa. Both species are found along stream banks in the area. In this particular instance, M. tomentosa subsp. tomentosa is found along the Río Oro which parallels the road from Huahuapan de León to Oaxaca. Montanoa leucantha subsp. arborescens is found along the river that runs parallel to the road from Huahuapan de León to Tehuacán. The two rivers merge near Tamazulapan and so do the distributions of the two taxa, which grow together (FRa 2383, 2382) at the junction and for a short distance downstream. No morphological evidence of hybridization was found. All chromosome counts from both taxa were normal.

  • Distribution

    Distribution and Habitat: Mountains of western and southern Mexico from Sonora to Chiapas and Guatemala (Fig. 57); cool wet forests on mountain slopes, in higher altitudes in fields and along forest margins and at lower altitudes along roadsides and riverbanks as well as on steep slopes; 1000-2300 m, usually between 1500-1800 m.

    Mexico North America| Guatemala Central America|