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(Last Modified On 6/13/2013)
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(Last Modified On 6/13/2013)
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Species
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Blumea viscosa (Miller) Badillo
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PlaceOfPublication
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Revista Fac. Agron. (Maracay) 7(3): 9. 1974.
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Synonym
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Conyza viscosa Miller, Gard. Dict., ed. 8. 1768. TYPE: Veracruz, Houston (BM). Conyza lyrata H.B.K., Nov. Gen. Sp. PI. 4: 70. 1820. TYPE: Guayaquil, Humboldt & Bonpland (P). Eschenbachia lyrata (H.B.K.) Britt & Millsp., Fl. Baham. 444. 1920. Blumea lyrata (H.B.K.) Badillo, Bol. Soc. Venez. Ci. Nat. 10: 257. 1946. Ernstia lyrata (H.B.K.) Pittier, Cat. Fl. Venez. 505. 1947, genus ined. Pseudoconyza lyrata (H.B.K.) Cuatr., Ciencia (Mexico) 21: 31. 1961. Pseudoconyza viscosa (Miller) D'Arcy, Phytologia 25: 281. 1973. Blumea viscosa (Miller) D'Arcy, Phytologia 30: 5. 1975, redundant comb.
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Description
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Herb to ?70 cm tall; stems solid or sometimes hollow, drying yellowish or greenish, striate, sparingly pubescent with long (1 mm) slender, simple hairs, and pulverulent-viscose with short and sessile glandular hairs, the glands often drying amber-colored. Leaves alternate, simple or basally divided into stipulelike auricles, obovate or spatulate, basally narrowed into a petiolelike region or not, the margins evenly dentate, the teeth mucronulate, the minor venation obscure, the midveins often prominent, both sides sparingly pilose with long slender simple hairs and short or sessile glandular trichomes. Inflorescence mostly an open pan- icle subtended by leaflike bracts; pedicels slender, to 12 mm long, sometimes much shorter or wanting, bracteolate or not. Heads cupular; involucral bracts many in several unequal series, the outer series herbaceous, lanceolate with strigulose mar- gins and acute tips, strigose and glandular dorsally, the innermost slightly longer, more slender and more-or-less indurate, apically strigulose; receptacle naked, or with some small scattered simple hairs, mostly flat to depressed-hemispheric with a shallow central depression, 3-4 mm across; ray florets many, the corolla capillary, apically 3-notched, these in turn sometimes notched, ca. 3 mm long, little or not expanded basally, the style with a small nectary, the style branches mostly long exserted, the ovary fertile; disc florets few, 5 mm long, the corolla tubular, slightly expanded apically into a 5-toothed limb, slightly angled, the limb minutely pulverulent, the lobes with short, capitate hairs (colleters), the anthers ca. 1.2 mm long with fine basal tails and rounded, slightly longer than broad appendages, the style slightly expanded near the base, apically strigose and indistinct from the style branches which are unappendaged and open slightly or not at all, the ovary fertile. Achene brownish, plump, ellipsoid, prominently many-ribbed; pappus of numerous sthigose bristles in one series.
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Habit
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Herb
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Distribution
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Blumea viscosa occurs near seacoasts throughout the Caribbean region.
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Note
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Super- ficially much like species of Conyza, it differs in its dentate leaves which are much wider above the middle, in its plump achenes, and in the tails on the anthers. Several collectors report it to have a noxious odor. The species is closely related to African species such as Blumea mollis (D. Don) Merr. and species which Randeria (1960) placed in sect. Paniculatae. Blumea viscosa is the oldest name in the group. McVaugh (1972) notes that there may be two distinct varieties in the species, and if this is the case, Panamanian material should be known as Blumea viscosa var. lyrata (H.B.K.) D'Arcy. The typical variety viscosa refers to pale-pilose plants, less glandulari' than those occurring in Panama.
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Common
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Lechuguilla
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Specimen
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CANAL ZONE: Reserva forestal Madden, Candido 11 May 1970 (MO). Balboa, Macbride & Featherstone 37 (US). Ancon Hill, Piper 5572 (US). Balboa, Standley 30878 (US). cocLi: Aguadulce, Pittier 4966 (US). HEBRBERA: Las Salinas de Chitre on Bahia Parita E of Chitre, Croat 9691 (MO). LOS SANTOS: Between 1 mi S and 10 mi N of Tonosi, Duke 12487 (MO). 5 mi S of Pocri, Croat 9738 (MO). PANAMA: Panama City, Celestine 116 (US). Without definite location, Duchaissing (P). Isla Chepillo, Duke 10328 (MO). Isla Espiritu Santo, Duke 10450 (MO). Without definite locality, Grisebach 1857 (MO). Las Sabanas, Macbride 2671 (US) . Saboga Island, Miller 1977 (MO, US). Las Sabanas, Standley 30692 (US).
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