PIPER NORTH AMERICAN SPECIES OK FESTUCA. 21 



The American forms may be recognized by the following key: 



KEY TO THE SUBSPECIES OF FESTUCA RUBRA. 



Spikelets glabrous or merely scaberulous. 



Blades of the innovations involute, of the culm flat or folded; panicle not densely 

 congested. 

 Leaves and usually the spikelets green. 

 Florets not proliferous. 



Spikelets 7 to 8 mm. long nibra. 



Spikelets 10 to 12 mm. long i-ahra megastachys. 



Florets proliferous rubra prolifera. 



Leaves and spikelets glaucescent nihra glaucodea. 



Blades all plane. 



Spikelets green; lemmas lanceolate rubra multijiora. 



Blades all involute, rather rigid ; panicle very dense. 



Leaves green ; spikelets glabrous or glaucous rubra densiuscula. 



Leaves and spikelets very glaucous rubra pruinosa. 



Spikelets pubescent with short hairs rubra kitaibeliana. 



Spikelets villous, often somewhat woolly nibra lanuginosa. 



13a. Festuca rubra megastacliys Gaud. 



Festuca rubra megastachys Gsiud. Fl. Helv. 1: 287. 1828. Type from Switzerland. 

 Festuca rubra diversifolia Gaud. op. cit. 288. Type from Switzerland. 

 Festuca oregonaYasey , Bot. Gaz, 2: 126. 1877. Type specimen in the National 

 Herbarium from Oregon. 



Festuca rubra grandifiora Hack. Mon. Fest. 139. 1882. Based on F. rubra diversifolia 

 Gaud. 

 The following specimens are referred here: 

 Canada: 



Point Seche, Gasp^, Macoun 37. 

 New Jersey: 



Absecum, Commons 185. 

 Alaska: 



Attah Island, Macoun 22806. 

 British Columbia: 



Nanaimo, Macoun 29682. 

 Washington: 



Klickitat County, Suksdorf 1140. 

 Klickitat River, Suksdorf 1147. 

 Oregon: 



Sauvies Island, Howell, June 15, 1882. 



13b. Festuca rubra prolifera subsp. nov. 



The plant of the White Mountains which has been referred to F. ovina vivipara L. is 

 in reality a viviparous form or state of F. nibra, differing only in its viviparous spike- 

 lets. It is said to be the only form of the plant occurring in the White Mountains, 

 and while properly a state rather than a subspecie's, may be named as above. It 

 seems surprising that no similar form occurs in Europe. 



The type is a specimen in the National Herbarium collected on Mount Washington 

 by Pringle in 1877. 



