Elaphoglossum hybridum (Bory) Brack., U.S. Expl. Exped. Filic.

Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, Phytotaxa 353 (1), pp. 448-450 : 448-450

Elaphoglossum hybridum (Bory) Brack., U.S. Expl. Exped. Filic. 16: 69. 1854. ( Fig. 17D–H )

= E. hybridum (Bory) Brack. var. vulcanii (Lepervanche ex Fée) Christ, Neue Denkschr. Allg. Schweiz. Ges. Gesammtem Naturwiss.

36(1): 104. 1899.

= E. propinquum (Mett. ex Kuhn) Christ, Neue Denkschr. Allg. Schweiz. Ges. Gesammtem Naturwiss. 36(1): 115. 1899.

= E. lindbergii (Mett. ex Kuhn) Rosenst., Hedwigia 46: 153. 1907.

Range: — Colombia and Venezuela to Bolivia ( CH, CO, LP, TA, SC), Argentina, and Brazil; islands of the mid- Atlantic Ocean; Africa; Madagascar and islands of the Indian Ocean.

Ecology: —Common; epiphytic, terrestrial, and saxicolous, often on rock faces in ravines and on rock walls, less commonly on grassy slopes or in humid forests; (700–) 1600–3700 m.

Notes: — Elaphoglossum hybridum is the most widely distributed species of sect. Polytrichia , being the only representative of this section outside the Neotropics. The morphological variation found across its range is perplexing, even within small populations. Diminutive fertile specimens, as in the holotype of Acrostichum hybridum var. vulcanii (Lepervanche-Mézières s.n., P00466255), are common throughout the range, but there is usually a complete series of intermediates between smaller and larger plants at the same locality ( Matos & Mickel 2014, Fig. 1 ). Juvenile individuals may have conspicuous hydathodes on their sterile leaves, but field observations indicate that these structures disappear with age. Larger plants grade into E. barbatum and E. erinaceum (see comments under E. barbatum ).

Lewis 881732 (MEXU, MO, UC), cited by Rojas-Alvarado (2010) as a new record of E. baquianorum A.Rojas for Bolivia, is here identified as this species.

Figures

FIGURE 1. A–C.Elaphoglossum affine (Camp 2683, NY, from Mexico). A. Habit. B, C. Rhizome scales. D–E.Elaphoglossum pteropus (from the protologue of Acrostichum alatum Fée, 1845). D. Habit. E. Sporangium and spores. F–L. Elaphoglossum praetrepidans (Paz et al. 30A, LPB, holotype). F. Habit. G. Crozier petiolar scale. H. Petiolar scale. J. Detail of blade adaxially. K. Detail of blade abaxially. L. Sterile blade scale.

FIGURE 17. A–C. Elaphoglossum blepharoglottis (Bryan 534, F, holotype). A. Habit. B. Rhizome scale. C. Sterile blade, abaxial surface. D–H. Elaphoglossum hybridum (Buchtien 415 and 5172, US). D. Habit. E. Rhizome scale. F. Sterile blade, adaxial surface. G. Habit. H. Sterile blade, abaxial surface.—Scale bars for habit = 5 cm, all other scale bars = 1 mm.