Marina diffusa var. radiolata Barneby

  • Authors

    Rupert C. Barneby

  • Authority

    Barneby, Rupert C. 1977. Daleae Imagines, an illustrated revision of Errazurizia Philippi, Psorothamnus Rydberg, Marine Liebmann, and Dalea Lucanus emen. Barneby, including all species of Leguminosae tribe Amorpheae Borissova ever referred to Dalea. Mem. New York Bot. Gard. 27: 1-892.

  • Family

    Fabaceae

  • Scientific Name

    Marina diffusa var. radiolata Barneby

  • Type

    Holotypus, NY.

  • Description

    Latin Diagnosis - Marina diffusa (Moric.) Barneby var. radiolata (rayed, of the banner) Barneby, var. nov., a var. diffusa panicula minus intricatim ramosa, foliis ultimis majoribus, foliolis praesertim 2-3-jugis, racemis inferioribus 9-25-floris terminalibus saltern 5-floris, vexillique lamina radiatim livido-striata eglandulosa separanda. — Nayarit. Ixtlan del Rio: La Barranca [= Plan de Barranca], feb 21, 1927, M. E. Jones. — Holotypus, NY.

    Species Description - Characters as given in key. — Collections: 17 (i).

    Distribution and Ecology - Brushy hillsides and banks of streams, 1050-1450 m (± 3500-4800 ft), locally plentiful but of restricted range in canyons leading to Rio Ameca and Rio Grande de Santiago in n.-centr. Jalisco and adjoining Nayarit and Zacatecas, s. in Jalisco to the basins of Lago Magdalena and Lago Atotonilco, w. to the headwaters of Rio Guachinango. — Flowering late August to March.

  • Discussion

    (Plate XXIV)

    While the panicle of var. radiolata is less elaborately ramified than that of var. diffusa the guise of the growing plant is hardly different, except for the deep maroon-purple of the petals, which appear almost black in strong sunlight. The range of var. radiolata forms an enclave within the extensive area occupied by its species, an enclave from which the type is nearly absent. Typical var. diffusa occurs abundantly along the hills around the north-west shore of Lago Chapala and has been collected in the canyon of one affluent of the Rio Grande northeast of Guadalajara (Ixtlahuacan de los Membrillos, Detling 8785, MICH), but these populations show no sign of intergradation to var. radiolata.

  • Distribution

    Zacatecas Mexico North America| Nayarit Mexico North America| Jalisco Mexico North America| Magdalena Colombia South America|