Eriosella caduca (Beal) Romasch., comb. nov.,

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: 97

publication ID

http://dx.doi.org/10.3897/phytokeys.126.34096

persistent identifier

http://treatment.plazi.org/id/D9C3AA55-9F6E-5589-9B32-236080115BEB

treatment provided by

PhytoKeys by Pensoft

scientific name

Eriosella caduca (Beal) Romasch., comb. nov.
status

 

× Eriosella caduca (Beal) Romasch., comb. nov. 

Oryzopsis caduca  Beal, Bot. Gaz. 15(5): 111. 1890 [Basionym] ≡ Eriocoma caduca  (Beal) Rydb., Mem. New York Bot. Gard. 1: 25. 1900 ≡ Stipa caduca  (Beal) Scribn., Contr. U.S. Natl. Herb. 3(1): 54. 1892 ≡ × Stiporyzopsis caduca  (Beal) B.L. Johnson & Rogler, Amer. J. Bot. 30: 55, f. 10, 14, 28-33. 1943 ≡ × Achnella caduca  (Beal) Barkworth, Phytologia 74(1): 15. 1993. Type: USA, Montana, Belt Mts., Sixteen Mile Cr., 11 Jul 1883, F.L. Scribner s.n. (holotype: US-745838!).

Comments.

× Eriosella caduca  is thought to be a hybrid between Eriocoma hymenoides  and Nassella viridula  . It can be separated from E. hymenoides  in having shorter hairs on the lemma and panicles with ascending branches (not divergent), and from N. viridula  in having longer lemma hairs, paleas 2/3-3/4 as long as the lemma, and readily deciduous lemmatal awns ( Barkworth 2007). Another species similar to × Eriosella caduca  is Eriocoma bloomeri  . However, the latter species has glabrous sheaths, shorter ligules, 5-veined lemmas, awns with a sub-plumose lower section below the bend, and anthers with more numerous apical hairs ( Johnson and Rogler 1943).

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Eriosella

Loc

Eriosella caduca (Beal) Romasch., comb. nov.

Peterson, Paul M., Romaschenko, Konstantin, Soreng, Robert J. & Reyna, Jesus Valdes 2019
2019
Loc

Achnella caduca

Barkworth 1993
1993
Loc

Stiporyzopsis caduca

B.L.Johnson & Rogler 1943
1943
Loc

Stipa caduca

Scribn. ex Vasey 1892
1892
Loc

Oryzopsis caduca

Beal 1890
1890