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Lagascea mollis

(Acuate, Silk Leaf, Silkleaf, Yaa Kammayee Lagascea Mollis)

Overview:

Conservation Status

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Population Trend:

Growing

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Taxonomy

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  • Kingdom: Plantae - Plants
    • Phylum: Tracheophyta - Vascular Plants
      • Class: Magnoliopsida - Dicotyledons
        • Order: Asterales
          • Family: Noctuoidea
            • Genus: Lagascea (la-GAHS-see-yuh) Cavanilles, Anales Ci. Nat. 6: 331. 1803. - Doll's-head, acuate, silk-leaf, velvet-bush [For Mariano Lagasca y Segura, Spanish botanist at the Madrid Botanical Garden]
              • Specific epithet: mollis Cav.
                • Botanical name: Lagascea mollis Cav.

Unambiguous Synonyms:

  1. Nocca mollis (Cav.) Jacq.

Notes:

Name Status: Accepted Name. Latest taxonomic scrutiny: 15-Mar-2000

Place of publication: Anales Ci. Nat. 6:333, t. 44. 1803

Name verified on 27-Apr-1992 by ARS Systematic Botanists. Last updated: 09-May-2007

Physical Description

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Genus Lagascea:

Shrubs [annuals, perennials], to 50-100[-300] cm. Stems erect [ascending to decumbent], branched from bases or ± throughout. Leaves cauline ; opposite; petiolate [sessile]; blades 3-nerved, lance-ovate to ovate [lanceolate to oblanceolate], bases broadly cuneate [to sub­auriculate], margins ± serrate, faces usually sericeous to strigose or glabrate, often stipitate-glandular. Heads discoid, borne in headlike glomerules (of [8-]30-50+, 1(-2) [-8]-flowered heads, glomerules borne singly or in ± corymbiform [racemiform] arrays). Involucres cylindric, 1-2 mm diam. (glomerules of heads usually subtended by leaves or ± foliaceous bracts). Phyllaries persistent, 4-5[-8+] in ± 1 series (linear-attenuate, proximally connate, often 1 or more with 1[-3+] glands in abaxial face). Receptacles convex (often hirtellous), rarely paleate (paleae linear). Ray florets 0. Disc florets 1(-2) [-8], bisexual, fertile; corollas yellow [white, pink, or red], tubes shorter than cylindric to campanulate throats, lobes 5, lance-linear to lance-ovate [rounded-deltate] (often hairy). Cypselae (brown to black) narrowly cylindric to obovoid or clavate (faces glabrous or pilosulous, minutely grooved) ; pappi ± coroniform. x = 17.

Species 8: sw United States, Mexico, Central America (to Nicaragua) ; introduced in West Indies, South America, Asia (India, Java, Sri Lanka, Thailand), Africa, Pacific Islands (Hawaii).

Lagascea mollis Cavanilles, now a nearly pantropical weed, was collected at Apalachicola, Franklin County, Florida (Chapman, n.d., presumably ca. 1860), evidently from an ephemeral population, probably from ballast.[1]

Habit: Forb/herb

Distribution

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Range and Population

Caribbean

Native: Jalisco, Michoacan.

Reproduction

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Duration: Annual

Similar Species

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Members of the genus Lagascea:

There are approximately 24 species, subspecies, varieties, forms, and cultivars in this genus: L. angustifolia · L. aurea · L. biflora · L. campestris · L. decepiens · L. decipiens (Beguiling Mexican Daisy) · L. decipiens var. glandulosa · L. glandulosa · L. helianthifolia · L. heteropappus · L. kunthiana · L. latifolia · L. media · L. mociniana · L. mocinniana · L. mollis (Acuate) · L. palmeri · L. parvifolia · L. pringlei · L. rigida · L. rigida var. mocinniana · L. rubra · L. suaveolens · L. tomentosa

Bibliography

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  • Harris, E. M. 1994. Developmental evidence for the derivation of syncephalia in Lagascea (Heliantheae; Asteraceae). Amer. J. Bot. 81: 1139-1148.
  • Holm, L. et al. 1979. A geographical atlas of world weeds. (Atlas WWeed)
  • McVaugh, R. 1983–. Flora Novo-Galiciana. (F NGalicia)
  • Seed Regulatory and Testing Branch, Agricultural Marketing Service, U.S.D.A. 1999. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act. (State Noxweed Seed)
  • Stuessy, T. 1978. Fieldiana, Bot. 38:90–91.
  • Stuessy, T. F. 1976. A systematic review of the subtribe Lagasceinae (Compositae, Heliantheae). Amer. J. Bot. 63: 1289-1294.
  • Stuessy, T. F. 1978. Revision of Lagascea (Compositae, Heliantheae). Fieldiana, Bot. 38: 75-133.

More Info

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Notes

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Contributors:

  • Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
  • Global Biodiversity Information Facility. Accessed October 14, 2007. http://www.gbif.org Mediated distribution data from provider.
  • USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN) [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland. URL (April 28, 2008)

Data Sources:

Accessed through GBIF Data Portal November 25, 2007:

Identifiers:

Footnotes:

  1. Elizabeth M. Harris "Lagascea". in Flora of North America Vol. 21 Page 135, 136. Oxford University Press. Online at EFloras.org.

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Last Revised: June 10, 2008