27] Gramineae. 339' 



so sliort tliat tlie greater part of tlie back of tlie fertile florot in exposed, 



miglit at the first glanoe suggest affiiüty, biit neither tlie liabit nnr the 



strueture of the spikelot — exoept for the character alluded to — Supports 



tliat view. In fact P. canaliculatum, ,,a very peculiar species", as Hooker 



calls it, finds its dosest allies among tbe species of Setaria in. whicli tho 



,,bristle'" apparatus is reduced to a minimum. whilst P. nodosiim and its 



congeners represent a small group of closely allied species the affiiiity 



of which is not quite cdear, but may i)erhaps be looked for in the neigh- 



bourhood of Ichnantlius and Poecilostachys. There is some resemblance 



to Digitaria. but it is merely superficial. 

 Hemigymnia Arnottiana Stapf 1. c. p. 742 (= Paniciim Arnotfianiim Nees = P. 



nodosiim Franch. = P. malabariciim Merrill). — Franz. -Kongo (Chevalier 



n. 10 95H, Thollon n.4087. 380); Belg.-Kougo (Vauderyst n. 4518. 4519. 4153). 

 Hierochloe pallida Hand.-Mzt. in Akad. Anz. Wien Nr. 25 (1920) p. 8. — 



Setschwan (Handel-Mazzetti n. 1766). 

 Hordeum daghestanicum Alex. var. gracile Grossh. et Sosnowsky in Monit. 



Jard. Bot. Tiflis, Annees XIII et XIV (1917/18) 1919, p. 45. — Trans- 



kaukasien. 

 Horolosioii LuneU nom. nov. in Amer. Midi. Nat. IV (1915) p. 224 (= Festuca 



Dodon. = Festucaria Heisker = Festuca L.). 

 H. octoflora (Walt.) Luncll 1. c. p. 224 (= Festuca octoflora Walt.). — North 



Dakota 

 H. ovina (L.) LuneU 1. c. p. 224 (= Festuca ovina L.). — North Dakota. 



var. supina (Hack.) Lunell 1. c. p. 224 (= Festuca ovina var. supina 

 Hack.). — North Dakota. 

 H. elatior (L.) Lunell 1. c. p. 224 (= Festuca elatior L.). — North Dakota. 

 H. nutans (Willd.) Lunell 1. e. p.224 (= Festuca nufansWilld.). — NorthDakota. 

 H. viridula (Vasey) Lvinell 1. c. p. 224 (= Festuca viridula Vasey). — North 



Dakota. 

 Isachne commelinifolia Warburg in Fedde, Eep. XVI (1920) p. 352. — Liu- 



Kiu-Inseln. 

 /. angusta Stapf in Kew Bull. 1920, p. 28. — Bourbon. 

 Lepturus inciirvatus Trin. var. longijlorus Grossh. in Moniteur Jard. Bot. 



Tiflis, Annees XIII et XIV (1917/18) 1919, p. 40, Tab. III (= Monerma 



cylindrica auct. fl. cauc). — Baku. 

 Lasiacis leptostachya Hitchc. in Contrib. U. S. Nat. Herb. Washington XXII 



(1920) p. 19. — Nicaragua (Hitchcock n. 8718). 

 Milium barbipulvinatum (Nash) Lunell in Amer. Midi. Nat. IV (1915) p. 212 



(= Panicum barbipulvinatum Nash). — North Dakota. 

 M. virgatum (L.) Lunell 1. c. p. 212 (= Panicum virgatum L.). — North Dakota, 

 var. elongatum (Vasey) Lunell 1. c. p. 212 (= Panicum virgatum var. 

 elongatum Vasey). • — North Dakota. 

 M. Leibergii (Vasey) Lunell 1. c. p. 213 (= Panicum Leibergii (Vasey] Scribn. 



= P. scoparium var. Leibergii Vasey). — North Dakota. 

 M. Wilcoxianum (Vasey) Lunell 1. c. p. 213 (= Panicum Wilcoxianiim Vasey). 



— North Dakota. 

 Muhlenbergia brevifolia (Nutt.) Farw. in Michigan Acad. Sei. Rept. XVII 



(1915) 1916, p. 181 (= Agrostis brevifolia Nutt. = Vilfa cuspidata Torr. 



= Muhlenbergia cuspidata Rydb. = Sporobolus brevifolius Scribn.). — 



Michigan. 



