Eriocoma hymenoides (Roem. & Schult.) Rydb., Bull. Torrey Bot. Club 39(3): 102. 1912.

Peterson, Paul M., Romaschenko, Konstantin, Soreng, Robert J. & Reyna, Jesus Valdes, 2019, A key to the North American genera of Stipeae (Poaceae, Pooideae) with descriptions and taxonomic names for species of Eriocoma, Neotrinia, Oloptum, and five new genera: Barkworthia, x Eriosella, Pseudoeriocoma, Ptilagrostiella, and Thorneochloa, PhytoKeys 126, pp. 89-125 : 95

Eriocoma hymenoides (Roem. & Schult.) Rydb., Bull. Torrey Bot. Club 39(3): 102. 1912.

Stipa hymenoides Roem. & Schult., Syst. Veg. 2: 339. 1817 [Basionym] ≡ Stipa membranacea Pursh, Fl. Amer. Sept. II: 728. 1814 nom. illeg., non Stipa membranacea L. ≡ Oryzopsis membranacea Vasey, U.S.D.A. Div. Bot. Bull. 12(2): 10, t. 10. 1891, nom. illeg. superfl. ≡ Eriocoma membranacea (Vasey) Beal, Grass. N. Amer. 2: 232. 1896, nom. illeg. superfl. ≡ Oryzopsis hymenoides (Roem. & Schult.) Ricker ex Piper, Contr. U.S. Natl. Herb. 11: 109. 1906 ≡ Achnatherum hymenoides (Roem. & Schult.) Barkworth, Phytologia 74(1): 7-8. 1993. Type: USA, on the banks of the Missouri River, J. Bradbury no. 12 (lectotype: K-000912825 [image!] designated here; isolectotype: PH-00008181 [image!]). Fig. 1G-L .

Eriocoma hymenoides = Eriocoma cuspidata Nutt., Gen. N. Amer. Pl. 1: 40. 1818 ≡ Milium cuspidatum (Nutt.) Spreng., Syst. Veg. 1: 251. 1824 ≡ Urachne lanata Trin. & Rupr., Mem. Acad. Imp. Sci. Saint-Petersbourg, Ser. 6, Sci. Math., Seconde Pt. Sci. Nat. 3,1(2-3): 126. 1834, nom. Illeg. superfl. ≡ Eriocoma membranacea Steud., Nomencl. Bot. (ed 2) 1: 586. 1840, nom. inval., as syn. of Urachne lanata Trin. ≡ Oryzopsis cuspidata (Nutt.) Benth. ex Vasey, Grass. U.S. 23. 1883. Type: USA, Platte Plains, T. Nuttall s.n. (lectotype: BM-001042144 [image!]) designated here; isolectotype: LE-TRIN 1466.01 ex PH!).

Eriocoma hymenoides = Fendleria rhynchelytroides Steud., Syn. Pl. Glumac. 1: 420. 1854. Type: USA, New Mexico, near Santa Fe, 1847, A. Fendler 979 (lectotype: P-01941338 [image!] designated here; isolectotypes: GH-00023719 [image!], K-000912824 [image!], NY [image!], S14-1154 [image!], US-823154 [image!], W-0029207 [image!], W-0029208 [image!], W-18890236595 [image!].

Figures

Figure 1. Barkworthia stillmanii: A habit B ligule C panicle D glumes E floret F floret (close up). Eriocoma hymenoides: G culm and panicle H panicle branch I glumes J floret K lemma awn L floret base (callus).