Trixis californica var. peninsularis (S.F.Blake) C.E.Anderson

  • Authority

    Anderson, Christiane. 1972. A monograph of the Mexican and Central American species of Trixis (Compositae). Mem. New York Bot. Gard. 22: 1-68.

  • Family

    Asteraceae

  • Scientific Name

    Trixis californica var. peninsularis (S.F.Blake) C.E.Anderson

  • Description

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    Species Description - Young stems, young branches, and inflorescence glandular and pilose to villous; internodes 1.2-6.2 cm long. Petioles not winged; blades strigose to pilose and glandular above, pilose to villous or lanate and usually glandular beneath; margins denticulate to dentate in large leaves, rarely entire, usually revolute; stomates on the lower surface only. Peduncles glandular and pilose or setose. Accessory bracts 4-5, (5.5-)8-16(-20) mm long, 1-4 mm wide, sometimes subulate but usually linear to linear-lanceolate to lanceolate, acuminate at the apex, sessile, glandular and setose or pilose on both surfaces; margins entire, flat or slightly recurved; midrib somewhat prominent beneath. Phyllaries strigose on the distal portion of the adaxial surface, glandular and setose on the abaxial surface. Flowers (15-) 17-19. Corolla: tube, outer, and inner lip glabrous or rarely with a few glandular trichomes and nonglandular hairs.

  • Discussion

    Trixis peninsularis Blake, Contr. U.S. Nat. Herb. 22: 654. 1924. Type. Baja CaUfomia Sur: San Jose del Cabo, 25 Mar 1911, Rose 16457 (US! holotype; NY! isotype).

    This variety differs from var. californica mainly in its dense pubescence, especially on the spreading leaves, in the lack of stomates on the upper leaf surface, in the few narrow accessory bracts, and in the glabrate corollas. Little is known about its habitat. Only Wiggins 14717 is accompanied by such data: "On granitic bajada ." Apparently var. peninsularis is one of the numerous endemics of the Cape forest. The factors that influence and contribute to the unique character of the Cape flora are discussed by Shreve (1937).

  • Distribution

    Known only from southern Baja Cahfornia Sur (Fig. 11); collected in flower from January to March and in fruit in March. Specimens examined. MEXICO. Baja California Sur: San Jose del Cabo, 8 Mar 1892, Brandegee 347 (US), 17 Feb 1940, Dawson 1161 (MICH); Laguna Mountains, 2 Mar 1923, Jones 24603 (NY); La Paz, 20 Jan-5 Feb 1890, Palmer 7 (GH, US); San Jose del Cabo, 25 Mar 1911, Rose 16457 (NY, US, type of T. peninsularis); 13 mi E of Cabo San Lucas, 27 Mar 1935, Shreve 7271 (MICH); bajada just N o

    Mexico North America|