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glabriflorus, Elymus glaucus, Elymus hirsutus, Elymus hoffmannii, Elymus hystrix, Elymus interruptus, Elymus lanceolatus, Elymus macgregorii, Elymus macrourus

disagreement is the treatment of Elytrigia Desv., Roegneria K. Koch, and Hystrix Moench. Species sometimes placed in Elytrigia are here included in Elymus

IllustratedEndemic Basionym: Chamaerops hystrix Pursh Fl. Amer. Sept. 1: 240. 1814 Synonyms: Rhapis caroliniana Hort ex Kunth Sabal hystrix (Pursh) Nuttall Treatment

speciesElymus hystrix L. Mary E. Barkworth, Julian J.N. Campbell, Bjorn Salomon Common names: Bottlebrush grass Glumeless wlldrye Endemic Synonyms: Hystrix patula

palm, Rhapidophyllum hystrix. Principes 32: 18--25. Shuey, A. G. and R. P. Wunderlin. 1977. The needle palm: Rhapidophyllum hystrix. Principes 21: 47--59

names: Mediterranean barley Geniculate barley Introduced Synonyms: Hordeum hystrix Hordeum geniculatum Critesion marinum subsp. gussoneanum Treatment appears

Cucumis (comprising two species, C. sativus and the closely similar C. hystrix Chakravarty) and subg. Melo (Miller) C. Jeffrey. Infrageneric classification

Mary E. Barkworth, Julian J.N. Campbell, Bjorn Salomon Synonyms: Sitanion hystrix Elymus pubiflorus Elymus glaber Sitanion longifolium Sitanion pubiflorum

Barkworth, Julian J.N. Campbell, Bjorn Salomon Endemic Synonyms: Sitanion hystrix var. hordeoides Treatment appears in FNA Volume 24. Treatment on page 319

and A.H. Holmgren. 1962. Natural hybrids of Elymus cinereus and Sitanion hystrix. Bull. Torrey Bot. Club 89:217-228 Lepage, E. 1952. Etudes sur quelques

Salomon Common names: Longleaf squirreltail Endemic Synonyms: Sitanion hystrix var. brevifolium Elymus longifolius Elymus elymoides var. longifolius Treatment

Salomon Common names: California squirreltail Endemic Synonyms: Sitanion hystrix var. californicum Sitanion californicum Treatment appears in FNA Volume

closely allied to E. hystrix (p. 316). Campbell (2002) suggested E. interruptus may have arisen from the introgression of E. hystrix or a related species

Eur., 6. 1860,. Virginia S. Bryan Synonyms: Ephemerum spinulosum var. hystrix (Lindberg) Grout Phascum serratum var. angustifolium Drummond Treatment

300 m. It used to be included in Hystrix Moench, a genus that was described as lacking glumes. The type species of Hystrix has since been shown to be more

316) and E. cburchii (see next), may be derived from hybrids between E. hystrix (p. 316) and E. canadensis (p. 303) (Church 1967a), even though E. canadensis

originated from hybrids between E. canadensis var. canadensis (p. 305) and E. hystrix (see next), although part of its range extends further west than the current

Common names: Canyon gooseberry IllustratedEndemic Synonyms: Grossularia hystrix (Eastwood) Coville & Britton Grossularia leptosma Coville Grossularia menziesii (Pursh)

R. 1964. Natural and synthetic hybrids of Agropyron spicatum x Sitanion hystrix. Bull. Torrey Bot. Club 91:396-405. ×pseudelymus saxicoia window.proper

Arecaceae Arecaceae Coccothrinax argentata Thrinax morrisii Rhapidophyllum hystrix Arecaceae Arecaceae Arecaceae Serenoa repens Livistona chinensis Acoelorraphe

Arecaceae Arecaceae Coccothrinax argentata Thrinax morrisii Rhapidophyllum hystrix Arecaceae Arecaceae Arecaceae Serenoa repens Livistona chinensis Acoelorraphe

have originated from hybridization between E. canadensis (p. 303) and E. hystrix (p. 316); occasional intermediates with both species exist (Campbell 2002)

can hybridize with E. glabriflorus (p. 296), E. virginicus (p. 298), E. hystrix (p. 316) and allies, E. glaucus (p. 306), E. trachycaulus (p. 321), Pseudoroegneria

several other taxa, especially E. virginicus var. virginicus (p. 300) and E. hystrix (p. 316), but the hybrids produce only late, depauperate spikes or none

from introgressants between the two species (Davies 1980). Hybrids with E. hystrix (p. 316) are also known, with apparent introgression at some range margins

macregorii hybridizes with several species, but especially E. virginicus and E. hystrix (p. 316) (Campbell 2000). Western plants often have smaller, more condensed

×pseudorepens (E. lanceolatus), and E. ×saundersii (E. elymoides). Hybrids with E. hystrix have been named ×Agroelymus dorei Bowden; the appropriate combination has

×ebingeri is the name for hybrids between E. virginicus (p. 298) and E. hystrix (p. 316). It is frequently found where the two parental species grow together

sense, including many species listed elsewhere under Agropyron, Sitanion, Hystrix, and various newly adopted names. 4The percentages assigned to the gene

 P. sandbergii, Pseudoroegneria spicata (= Agropyron spicatum), Sitanion hystrix, Sporobolus airoides, and Stipa comata (A.Cronquist et al. 1972+, vol.1;