The Botany of Iceland - 01.12.1942, Side 118

116
JOHS. GRONTVED
Fig. 31. a. Sparganium affine Schnitzl.—
b. S. hyþerboreum Laest.—c. S. minimum
(Hartm.) Fr. 1 :1.
35. Sparganium minimum
(Hartm.) Fr., in Botan. Noti-
ser, 1849, p. 154.
(Syn. S. natans P. minimum
Hartm. Handb. (1820), p.
43).
Babington, 1871, p. 334.—Rostrup,
1887, p. 183.—Stefánsson, Fl. ísl.,
ed. 1, 1901, p. 63.—Ibid., ed. 2,
1924, p. 71.—C.H.O., Fl. arct.,
1902, p. 17,—O. & Gr., 1934,
p. 11.
Flora Dan. tab. 260.
Icelandic: Tjarnabrúsi. Danish: Spæd
Pindsvineknop. English :' Small Bur-reed.
In Iceland S. minimum has not the
typical look, moreover it is in most cases
reminiscent of intermediate forms be-
tween the typical form of this species
and Sp. hyperboreum (W. Rothert in
schedula). Little material, however, is at
hand in H.H., and more would be highly
desirable for a closer study of this spe-
cies.
Here and there, in some parts even
frequent; it has not as yet been found
in the central parts. See fig. 33.
Life-form : HH (Hydrophyte).
In smaller lakes, ditches, old peat-pits,
etc.
Flor. VII; fr. mat. VIII.
Max. length: 51 cm; average: 35 cm.
Geogr. area: Am.: Newfoundland to Alaska, southward to Oregon, Utah, Colorado,
New Jersey.—Eur. : E.S.I.; from the Arctic circle to the Mediterranean; Caucasus.
—Asia : From Yenisei (66° N. lat.) southward to Omsk, Sajan-Mts; Japan.
Potamogetonaceae.
36. Potamogeton alpinus Balbis, Miscell. Bot. (1804) p. 13.
P. rufescens Schrad., Babington, 1871, p. 334.—Id., P. lanceolatus Sm. (Syn.
P. nigrescens Fries?).—Baring-Gould, 1863, p. 435.—P. ruf. Schrad., Gren-
lund, Isl. Fl., 1881, p. 104.—Bennet, 1890, p. 81.—P. alp. Balb., Stefánsson,
Fl. ísl., ed. 1, 1901, p. 18.—Ibid., ed. 2, 1924, p. 21.—C.H.O., Fl. arct.,
1902, p. 19.—O. & Gr., 1934, p. 13.
Flora Dan. tab. 1450 and 1635 (P. rufescens Schrad.).
Icelandic: Fjallnykra. Danish: Rust-Vandaks. English: Small-spiked Pond-weed.
Frequent to common in N. and S.W.; in E. here and there, otherwise rare.
Not observed in the central parts. Often in fruit. See fig. 34. Bennet, loc. cit.,