Compilation
Gymnogramma ehrenbergiana

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Name

Identification
Gymnogramma ehrenbergiana Klotzsch [family POLYPODIACEAE ] Verified by Palacios-Rios, M., Bommeria ehrenbergiana (Klotzsch) Underw. [family POLYPODIACEAE ] (stored under name); Verified by Not on sheet.,
Related name
  • Gymnogramma podophylla
  • Hemionitis pedata
  • Gymnogramma ehrenbergiana
  • Bommeria hispida
  • Bommeria ehrenbergiana

Flora

Entry for Bommeria hispida (Kuhn) L. Underwood [family ADIANTACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 2,
Names
Bommeria hispida (Kuhn) L. Underwood [family ADIANTACEAE], Bull. Torrey Bot. Club, 29: 633. 1902
Gymnogramma hispida Kuhn [family ADIANTACEAE], Linnaea, 36: 72. 1869
Bommeria schnafferi E. Fournier [family ADIANTACEAE]
Gymnogramma ehrenbergiana Klotzsch var. muralis Pringle ex Davenport [family ADIANTACEAE]
Gymnopteris hispida (Kuhn) L. Underwood [family ]
Treatment Author(s)
Christopher H. Haufler
Information
Stems long-creeping and often branched. Leaves arising at 7--10 mm intervals. Petiole generally rounded (but distally grooved in some large leaves); indument of scales proximally, of scales and trichomes distally, central portion generally glabrous. Blade 1--7 cm, about as long as wide; ultimate segments rounded at apex; abaxial indument of scales (commonly with 10+ cells across base), unicellular needlelike trichomes (0.75--1.12 mm), and unicellular coiled trichomes (ca. 1--2 mm); adaxial indument of unicellular needlelike hairs 0.47--1.11 mm, arising from unspecialized basal cells; rachis chestnut brown. Veins free. Sporangia covering 2/3--3/4 distance from margin of blade to costa of each ultimate segment. Spores 64 per sporangium; perispore surface crested. 2 n = 60.
Phenology
Sporulating summer--fall
Altitude range
1000--2500 m
Distribution
Mexico.USA Ariz.USA N.Mex.USA Tex.
Discussion
Bommeria hispida is the only member of this genus to occur north of Mexico. It is the most morphologically distinct species in the genus, having a relatively small leaf size, dissected segments, and copious and diverse leaf indument. Natural hybrids involving B . hispida are unknown. The pedate blade shape, lack of colored farina abaxially, and presence of both needlelike and coiled trichomes abaxially serve to distinguish this species from sympatric members of Cheilanthes , Notholaena , and Pentagramma .
Reports of Bommeria hispida in California (C. H. Haufler 1979) are based on old specimens with questionable locality data.

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