Part 7 - UNC Herbarium

POACEAE 890
* Hordeum murinum Linnaeus ssp. leporinum (Link) Arcangeli. Pd (GA, NC, VA), Cp (SC, VA): disturbed areas; rare,
introduced from Mediterranean Europe. May. A tetraploid taxon. [= K, Z; = H. leporinum Link – RAB, C, HC; < Hordeum
murinum Linnaeus – G, S; = Critesion murinum (Linnaeus) Á. Löve ssp. leporinum (Link) Á. Löve]
Hordeum pusillum Nuttall, Little Barley. Cp, Pd, Mt (GA, NC, SC, VA): roadsides, ditches, disturbed areas; common.
April-June. Se. NY west to MN, south to n. FL, s. TX, and s. AZ. A diploid taxon. [= RAB, C, F, G, HC, K, S, W, Z; =
Critesion pusillum (Nuttall) Á. Löve]
* Hordeum vulgare Linnaeus, Barley. Cp, Pd (NC, SC, VA), Mt (VA): cultivated fields, occasionally persistent as a waif;
commonly cultivated, rare as a waif, introduced from Eurasia. May-June. A diploid taxon. The original wild form is often
treated as H. vulgare ssp. spontaneum and the cultivated, non-shattering derivative as ssp. vulgare (Hancock 2004). The wild
form was used as a food source since at least 19,000 years ago, and ssp. vulgare developed by 8500 years ago. [= RAB, C, F, K,
Z; > H. aegiceras Nees ex Royle – G; > H. vulgare var. vulgare – G, HC; > H. vulgare var. trifurcatum (Schlechtendahl) Alefeld
– G, HC; > H. vulgare ssp. vulgare; > H. vulgare ssp. spontaneum (K. Koch) Thellung]
*? Hordeum brachyantherum Nevski ssp. brachyantherum is reported for se. PA (Rhoads & Klein 1993) and also is
apparently known from specimens from GA (Sorrie, pers. comm.). A tetraploid taxon. [= K; Critesion brachyantherum (Nevski)
Barkworth & D.R. Dewey] {not keyed at this time}
* Hordeum depressum (Scribner & J.G. Smith) Rydberg. Cp (SC): waste areas around wool-combing mills; rare, introduced
from w. North America. A tetraploid taxon. [= HC, K; = Critesion depressum (Scribner & J.G. Smith) Á. Löve] {not keyed at
this time}
Hystrix Moench
(see Elymus)
Imperata Cirillo (Cogongrass, Satintail)
A genus of about 8-9 species, of tropical, subtropical, and warm temperate areas of both hemispheres. References: Gabel in
FNA (2003a); Ward (2004c)=Z; Hall (1998)=Y.
* Imperata cylindrica (Linnaeus) Palisot de Beauvois, Cogongrass, Brazilian Satintail. Cp (GA, SC): grassy roadside; rare,
introduced fom the tropics. See Nelson (1993) for first report from SC. An extremely aggressive and dangerous weed, now wellestablished
and rapidly invading fire-maintained Coastal Plain areas (such as longleaf pine and slash pine flatwoods and longleaf
pine clayhills) on the Gulf Coastal Plain of FL, AL, and MS. Hall (1998) argues that I. cylindrica and I. brasiliensis are not
distinct. The only character considered to separate them is that I. brasiliensis has 1 anther and I. cylindrica has 2. Ward (2004c)
treats the 2 taxa at varietal level. Both putative taxa are present in the Gulf Coast area of FL, GA, AL, and LA. [= Y; > I.
cylindrica – FNA, HC, K; > I. brasiliensis Trinius – FNA, HC, K, S; > I. cylindrica var. cylindrica – Z; > I. cylindrica var.
mexicana (Ruprecht) D.B. Ward – Z]
A genus of about 60 species, north and south temperate.
Koeleria Persoon (Junegrass, Koeleria)
Koeleria macrantha (Ledebour) J.A. Schultes, Junegrass, South to DE, MD, PA, KY, and AL (Kartesz 1999). [= K; K.
pyramidata (Lamarck) Palisot de Beavois – C]
Lachnagrostis Trinius 1820
A genus of about 20 species, of the Southern Hemisphere. References: Soreng et al. (2003); FNA in prep.
* Lachnagrostis filiformis (G. Forst.) Trinius, Pacific Bentgrass. Cp (SC): waste areas around wool-combing mill; rare,
perhaps only a waif, native of Australia. [= FNA; = Agrostis avenacea J.F. Gmelin – K]
Lagurus Linnaeus (Hare's-tail Grass)
A monotypic genus, of the Mediterranean region. References: Tucker (1996)=Z.
* Lagurus ovatus Linnaeus, Hare's-tail Grass. Cp (NC): on ballast; rare, introduced from Mediterranean Europe. April-June.
[= RAB, HC, K, Z]