346 DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS. 
D, elata, Blytt, is the form /3. major of phragmitoides, according to Andersson, which 
approaches lanceolata. 
Calamagrostis litorea, DC., is a synonym of laxa 9 Host., according to Grisebach. 
According to Fries, it is an insufficiently defined species. Andersson observes its ex- 
tremely close affinity with Fpigejos. 
C. Halleriana, Gaud. A distinct species, according to Grisebach, Fries, and Andersson, 
who, however, says (under lanceolata, var, cinerascens) , " C. Halleriance proxima," 
and, again, " inter C. lanceolatam et phragmitoidem omnino media videtur." 
O. phragmitoides, Hartm. Also kept up by Grisebach, Fries, and by Andersson, who 
observes of one variety, " C. Halleriance analoga ;" of another, " ad C. lanceolatam 
quodammodo vergens;" and of a third, "a O. lanceolata difficile dignoscitur." 
Hierochloe racemosa, Tr., is a synonym of pauciflora, according to Grisebach. 
Deschampsia bremfolia, Br. This, the Aira arctica, Tr., who elsewhere regards it as 
a var. of caspitosa, is kept up by Grisebach. Fries reduces it. Andersson remarks of 
brevifolia, Hn., that it is very remarkable from resembling a hybrid between caspitosa 
and fiexuosa. 
Trisetttm agrostideum, Tr., is kept distinct from subspicatum by Andersson, Grisebach, 
and Fries. Andersson remarks that it is so entirely intermediate between flavescens and 
subspicatum, that it is extremely difficult to say to which it is best referred. 
T. Sibiricum, Bupr. (Aira Buprechtii, Griseb.), is distinguished by Grisebach by its 
much larger scabrous-bearded florets. Andersson observes how very near it is to 
agrostideum. 
Phippsia monandra, H. & A., is a synonym of algida, according to Grisebach. It is 
algida (5 of Kunth. It is kept distinct in c Flor. Bor.-Am.' 
Catabrosa aquatica, Br. Durand gives this as a native of Greenland, lat. 65° N. 
Colpodium pauciflorum, Hook. Only one habitat is known for this ; it may be a 
reduced or starved state of latifolium ; but much better specimens are required to deter- 
mine the point. 
C anmdmaceiim, Hook., is latifolium j3, Trinius and Grisebach, and is reduced to a 
synonym by Andersson. 
C. fulvumi Tr. Andersson doubts whether this and pendulinum are really distinct 
species ; and judging from the fine specimen in Herb. Hook., I am disposed to think, wit a 
reason. 
Toa dejlexa, Bupr., remotiflora, Bupr., and similis, Bupr., all of Samoyedland, are all 
reduced by Grisebach to Colp. pendulinum — the last as a variety, the two first as 
synonyms. 
P. scleroclada, Bupr., latiflora, Bupr., and pcecilantha, Bupr., all of Samoyedland, are 
reduced by Grisebach to synonyms of Colp.fulvum. 
Dtjpontia Fisheri, Br., was named after Mr. Fisher, one of Parry's officers, and shoul 
not be written Fischeri. 
D. psilosantha, Tr., of which Poa pelligera, Bupr., is a synonym, according to Grise- 
bach, is kept by that author as a distinct species. 
