Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

A NEW NARROWLY ENDEMIC SPECIES OF CLEMATIS (RANUNCULACEAE: SUBGENUS VIORNA) FROM NORTHEASTERN TEXAS

Dwayne Estes
SIDA, Contributions to Botany
Vol. 22, No. 1 (11 August 2006), pp. 65-77
Stable URL: http://www.jstor.org/stable/41968558
Page Count: 13
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A NEW NARROWLY ENDEMIC SPECIES OF CLEMATIS (RANUNCULACEAE: SUBGENUS VIORNA) FROM NORTHEASTERN TEXAS
Preview not available

Abstract

Clematis carrizoensis, a new narrowly endemic species of subgenus Viorna, is described from the Carrizo Sands of northeastern Texas. This species belongs to a complex of similar species characterized by glaucous and glabrous abaxial leaf surfaces and stems. Four additional species comprise this complex: C. addisonii, C. glaucophylla, C. texensis, and C. versicolor. Clematis carrizoensis is morphologically most similar to the scarlet sepaled C. texensis and the purplish-red to bluish-lavender sepaled C. versicolor. It differs from those two species in having yellowish-cream and lightly lilac-tinged sepals. From C. addisonii and C. glaucophylla, C. carrizoensis differs in sepal color and in having thicker and more reticulate leaves. All five species of the complex are allopatric and occupy somewhat different habitat types in different physiographic provinces. Further discussion of their morphological differences, geographic distribution, and habitat preferences is provided. Se describe Clematis carrizoensis, una nueva especies del subgénero Viorna, endémica de Carrizo Sands en el noreste de Texas. Esta especie pertenece a un complejo de especies similares caracterizadas por tener los tallos y el envés glaucos y glabros. El complejo tiene otras cuatro especies: C. addisonii, C. glaucophylla, C. texensis, y C. versicolor. Clematis carrizoensis es la más similar morfológicamente a C. texensis de sépalos escarlata y C. versicolor de sépalos que van del rojo púrpura al lavanda azulado. Difiere de estas dos especies por tener los sépalos amarillo crema ligeramente teñidos de lila. De C. addisonii y C. glaucophylla, se diferencia C. carrizoensis por el color de los sépalos y por tener las hojas más gruesas y más reticuladas. Las cinco especies del complejo son alopátricas y ocupan diferentes hábitats en provincias fisiográficas diferentes. Se ofrece una discusión sobre sus diferencias morfológicas, distribución geográfica, y preferencias de hábitat.

Page Thumbnails

  • Thumbnail: Page 
[65]
    [65]
  • Thumbnail: Page 
66
    66
  • Thumbnail: Page 
67
    67
  • Thumbnail: Page 
68
    68
  • Thumbnail: Page 
69
    69
  • Thumbnail: Page 
70
    70
  • Thumbnail: Page 
71
    71
  • Thumbnail: Page 
72
    72
  • Thumbnail: Page 
73
    73
  • Thumbnail: Page 
74
    74
  • Thumbnail: Page 
75
    75
  • Thumbnail: Page 
76
    76
  • Thumbnail: Page 
77
    77