The Botany of Iceland - 01.12.1942, Page 132
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JOHS. GRONTVED
Agrostis borealis Hartm.
A. rubra, K. & M., 1770, p. 204.—Babington, 1871, p. 342.—Gronlund, Isl. Fl.,
1881, p. 124.—Helgi Jónsson, 1896, p. 333.—Holmberg, Hartmans Handbok i
Skand. Flora, H. 1, 1922, p. 145.
This species was recorded by K. & M., loc. cit., and by some other older authors.
Gronlund entered it in his Flora, and it is also recorded for Icel. in Holmberg, Skand.
Flora, loc. cit.-—Several specimens of Agrostis in H.H. have been determined as this
species, but in all the cases I have seen the plant in question was Agrostis canina L.
It is, however, very likely that A. borealis may be found in Icel. It is easily
discerned from A. canina by its very short anthers (0.6—1.0 mm) ; in A. canina
the anthers are 1.2—1.8 mm long.
51. Agrostis canina., Linn., Sp. pl. ed. I (1753) p. 62.
K. & M., 1770, p. 204,—Babington, 1871, p. 342.—Gronlund, Isl. Fl., 1881,
p. 125.—Stefánsson, Fl. Isl., ed. 1, 1901, p. 61.—Ibid., ed. 2, 1924, p. 69.—
C.H.O., Fl. arct., 1902, p. 108,—O. & Gr., 1934, p. 20.
Flora Dan. tab. 1443
Icelandic: Týtulíngresi. Danish : Hunde-Hvene. English : Brown Bent-grass.
Common in all parts, in the lowland as well as in the central highland.
Besides the main form with well developed awns there occurs in Icel. the var.
mutica Rchb. without awns; also, a transitional form between var. mutica and the
main form, having some spikelets with awns, some without, occurs; this is the var.
variiflora (Waisb.) ; f. pallida Blytt, with yellowish panicles, is found in Glámuheiði,
N.W. and in some few other places.
Life-form: H.
On grassy slopes and heaths, in Iow copses, meadows; on sandy and stony ground,
in mó and melar.
Flor. VII—VIII; fr. mat. VIII.
Max. height: 43 cm ; average : 19 cm.
Geogr. area: Am.: (naturalized from Eur. in eastern U.S.A.) ; native in Newfound-
land.—Greenl.: W. 60°—66°55'. E. 60°—65°56'.—Eur.: Fær.; E.S.I.; throughout
Europe. Caucasus.—Northern Asia.
52. Agrostis stolonifera Linn., Sp. pl. ed. I (1753) p. 62.
K. & M., 1770, p. 204.—A. alba Linn., Babington, 1871, p. 342.—Gronlund,
Isl. FL, 1881, p. 125.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 61,—Ibid., ed. 2,
p. 70.—A. stolonifera L., C.H.O., Fl. arct., 1902, p. 108.—O. & Gr., 1934,
p. 20.
Flora Dan. tab. 1623.
Icelandic: Skriðlíngresi. Danish: Krybende Hvene, Fioringræs. English: Fiorin-grass.
Common in all parts, in the lowland as well as in the central highland. A valuable
fodder-grass.
var. maritima (Lam.), with greyish-green and rather stiff leaves, prostrate culms,
and with narrow, contracted panicles, occurs at the seaside.
Life-form: H.
On moist, sandy or clayey soil; grassy slopes ; in bogs and heaths, on the banks of
brooks and lakes; often in shallow water.
Flor. VII—VIII; fr. mat. (VIII).