Many of you have the new Jepson Manual and have had a chance to thumb through it.  You may have noticed that under the grasses (Poaceae), there have been quite a few changes since the first Jepson Manual was published in 1993. If splitting became the theme of the Asteraceae, the Poaceae went the opposite way, with re-unification of traditional genera the main theme.  Three genera especially stand out, Stipa, Elymus, and Festuca. Achnatherum and Nasella, the needlegrasses, are once again StipaPiptatherum (rice grass) is tossed in for good measure.   Leymus is once again folded back into Elymus (wild rye). Not only was the annual genus Vulpia returned to Festuca (fescues) as subgenus, so were plants we’ve long known under the genus Lolium.

For those of you that are interested and not sure you really want to go to the trouble of figuring out what happened to your favorite Orange County grass, I’ve summarized the changes for you below.     [ Click here for a PDF version of this document ]

Vascular Plants of Orange County, an Annotated Checklist (Roberts 2008) already reflects many of these changes.


Achnatherum coronatum (Thurb.) Barkworth =Stipa coronata Thurb.

Agrostis viridis Gouan = Polypogon viridis (Gouan) Breister

Alopecurus pratensis L. NEW ADDITION TO S. CALIF. FLORA. Previously known from farther north.

Arrhenatherum elatius (L.)J. Presl & C. Presl  NEW ADDITION TO S. CALIF. FLORA [WTR].  Previously known from farther north.  Presence in Santa Ana Mtns. [PR] (Roberts 2008) suggest it is more widespread then indicated in Jepson 2.

Bromus carinatusHook. & Arn.var.carinatus.  Some plants previously considered under this variety now represent the following:

Bromus carinatusvar.  marginatus (Steud.) Barkworth & AndertonNEW ADDITION TO S. CALIF. FLORA [CA].  A new segregate derived from B. carinatus var. carinatus.

Bromus pseudolaevipes Wagnon  NEW ADDITION TO S. CALIF. FLORA.  Resurrected name.  Previously treated under B. laevipes.

Cenchrus ciliaris L. =Pennisetum ciliare (L.) Link.

Cortaderia selloana (Schult.) Asch. & Graebn. =C.s. (Schult. & Schuff. f.) Asch. & Graebn.  Author correction.

Deschampsia danthonioides (Trin.) Benth. =D.d. (Trin.) Munro.   Author correction.

Eleusine coracana (L.) Greartn. subsp.africana (Kenn.-O’Byrne) Hilu & de Wet NEW ADDITION TO S. CALIF. FLORA [SCo, WTR, PR].

Elytrigia intermedia (Host) Nevski subsp. i. =Elymus hispidus (Opiz) Melderis

Elytrigia repens (L.) Nevski =Elymus repens (L.) Gould

Gastridium ventricosum (Gouan) Schinz & Thell. =G. phleoides (Nees & Meyen) C.E. Hubb. The name G. ventricosum misapplied.

Leptochloa uninervia (J. Presl) Hitchc. =L. fusca (L.) Kunth subsp. u. (J. Presl) N. Snow

Leymus condensatus(Scribn. & Merr.) A. Love = Elymus c. J. Presl

Leymus triticoides Buckley =Elymus t.Buckley

Lolium multiflorum Lam. = incl. underFestuca perennis (L.) Columbus & J.P. Sm.

Lolium perennis L. =Festuca perennis (L.) Columbus & J.P. Sm.

Lolium tementulum L. =Festuca tementula(L.) Columbus & J.P. Sm.

Monanthochloe littoralis Engelm. = Distichlis littoralis (Engelm.) H.L. Bell & Columbus

Muhlenbergia asperifolia (Nees & Meyen) Parodi = M.a.(Trin.) Parodi.  Author correction.

Muhlenbergia filiformis (Thurber) Rydb. =M.f. (S. Watson) Rydb.  Author correction.

Nassella cernua (Stebbins & A. Love) Barkworth =Stipa c. Stebbins & A. Love

Nassella lepida (Hitchc.) Barkworth =Stipa l. Hitchc.

Nassella pulchra (Hitchc.) Barkworth =Stipa p. Hitchc.

Panicum acuminatumvar.fasciculatum (Torr.) LelongNEW ADDITION TO S. CALIF. FLORA. Includes some specimens previously identified as D.a. var. acuminatum.  Presumably, Orange County plants belong here but I have not had the opportunity to examine the specimens.

Panicum dichotomiflorumMichx.  Our plants areP.d. subsp.dichotomiflorumOther subspecies in E. North America.

Panicum miliaceum L.  Our plantsP.m. subsp.miliaceum.

Paspalum vaginatumSw.NEW ADDITION TO S. CALIF. FLORA [SCo, DSon].

Piptatherum miliaceum (L. ) Cosson =Stipa miliacea (L.) Hoover var.miliacea

Secale cerealeL. NEW ADDITION TO S. CALIF. FLORA . Previously known from northern California. 

Setaria adhaerens (Forssk.)Chiov. NEW ADDITION TO S. CALIF. FLORA.

Setaria gracilisKunth.= S. parviflora (Poir.) Kerguelen.  More widespread.

Setaria pumilia(Poir.) Roem. & Schult.  Our plants now S.p.subsp. pumila.

Triticum aestivum L.NEW ADDITION TO S. CALIF. FLORA.

Vulpia bromoides (L.) S.F. Gray =Festuca b. L.

Vulpia microstachys (Nutt.) Benth. var. ciliata (Beal) Lonard & Gould =Festuca microstachys Nutt. Varieties not recognized.

Vulpia microstachys var. pauciflora (Beal) Lonard & Gould =Festuca microstachys Nutt.  Varieties not recognized.

Vulpia myuros (L.) CC. Gmelin var. hirsuta Hack. =Festuca myuros L.Varieties not recognized.

Vulpia myuros var. myuros Hack. =Festuca myuros L.  Varieties not recognized.

Vulpia octoflora (Walter) Rydb. var. hirtella (Piper) Henrard =Festuca o. Walter.  Varieties not recognized.

Vulpia octoflora var. octoflora (Piper) Henrard =Festuca o. Walter.   Varities not recognized.