Grasses: Bromus to Paspalum, Second Edition

Species Excluded

SPECIES EXCLUDED Agropyron caninum (L.) Beauv. Although this species is reported by Pepoon (1927) from Cook County, there apparently are no specimens to validate this report. Agropyron dasystachyum (Hook.) Scribn. Thieret and Evers (1957) point out that all previous reports of this species from Illinois are errors for A. smithii var. molle. Agropyron dasystachyum apparently has not been found in Illinois. Alopecurus geniculatus L. Although most early Illinois botanists used this binomial for what is now A. carolinianus, Alopecurus geniculatus refers to a species different from the plants which occur in Illinois. Ammophila arenaria (L.) Link. This is the binomial given to A. breviligulata Fern. by Gates (1912), Mosher (1918), and Pepoon (1927). Beckmannia erucaeformis (L.) Host. This is the binomial which was given to B. syzigachne by Pepoon (1927). Calamagrostis arenaria (L.) Roth. This is the binomial which was used by many early Illinois workers for Ammophila breviligulata Fern. Fernald (1920) points out that Calamagrostis arenaria is a different species. Calamagrostis coarctata Torr. ex Eaton. Although Mead (1846) and Lapham (1857) reported this species from Illinois, their reports are based on misidentifications for C. canadensis. Elymus diversiglumis Scribn. & Ball. This species ranges north of Illinois. The Brendel collection which Mosher (1918) reported as E. diversiglumis is Elymus hystrix L. with long, setaceous glumes and a more crowded inflorescence. Festuca nutans Moench. This species was not distinguished from F. obtusa by the early workers of Illinois. It appears, however , to be a distinct species which is unknown from the United States. Holcus halepensis L. This is the binomial which Mosher (1918) used erroneously for Arrhenatherum elatius (L.) Presl. Hordeum pratense Huds. Patterson (1874; 1876) and Schneck (1876) used this binomial erroneously for H. pusillum. The true H. pratense is a different species. Paspalum longepedunculatum LeConte. The Mosher (1918) 386 / S PEe I ESE X C L U D E D report of this southeastern species is an error for P. ciliatifolium Michx. with minutely hairy leaf surfaces. Paspalum longipilum Nash. Mosher (1918) reported this species from Illinois, but the specimens on which she based this report are actually P. pubiflorum Rupr. ex Fourn. var. glabrum (Vasey) Vasey ex Scribn. Paspalum repens Bergius. The report of this species by Mosher ( 1918) from Illinois is an error for P. fluitans· (Ell.) Kunth, since P. repens is an entirely different species. Paspalum supinum (Bosc) Poir. ex Lam. The specimens on which Mosher (1918) based this report are P. ciliatifolium Michx. Paspalum supinum is a species of the southeastern states. Poa cuspidata Nutt. in Bart. Since I have seen no Illinois collections of this grass, and since Hitchc(f)ck ( 1950) does not include it from Illinois, I am omitting Poa cuspidata from the Illinois flora. . Poa interior Rydb. Although I identified a collection from Piney Creek, Randolph County, as Poa interior, and reported this in 1967, I am excluding this species from the Illinois flora since I have not been able to relocate the specimen. Sphenopholis pallens (Biehler) Scribn. First attributed to Illinois by Deam (1910) and subsequently by other authors, this species occurs southeast of Illinois. The specimens on which the Illinois determinations were made are S. obtusata var. major. Sphenopholis palustris (Michx.) Scribn. Reported from Illinois by Robinson and Fernald (1908), this is a synonym for Trisetum pennsylvanicum (L.) Beauv. (See latter under Species Excluded.) Sphenopholis pennsylvanica (L.) Hitchc. Reported by Mosher ( 1918), this binomial is a synonym for Trisetum pennsylvanicum (L.) Beauv. (See latter under Species Excluded.) Stipa avenacea L. Lapham (1857) describes and illustrates this species, noting that it occurs in dry, sandy places in timbered land and openings. Although this species may well be in Illinois, it is excluded from the flora since no specimens have been seen to substantiate its occurrence in the state. Trisetum palustre (Michx.) Torr. This is a synonym for Trisetum pennsylvanicum (L.) Beauv. (See latter under Species Excluded.) Trisetum pennsylvanicum (L.) Beauv. The first report of this species from Illinois was in 1856 by Gray as Trisetttm palustre (Michx.) Torr. Although several later authors likewise reported Species Excluded / 387 this species from Illinois, probably copying Gray's reference, there have been no specimens found to authenticate its occurrence in Illinois. ...