The Botany of Iceland - 01.12.1942, Side 174

172
JOIIS. GRONTVED
Icelandic: Hnoðastör, Dúnhulstrastör. Danish: Pille-Star. English: Pill-headed
Sedge.
Found for the first time with certainty by H. Jónsson at Hellnar on Snæfellsnes,
W., 1897. It is very rare in Icel., so far it has only been found in two places in W.,
one place in N., one place in N.W. (I.D., 1935), and three places in E., see fig. 61.
Life-form :H.
On grassy ground, grassy slopes, rock-ledges, etc.
Flor. VI—VII; fr. mat. VII.
Max. height: 30 cm; average: 25 cm.
Geogr. area : Eur.: Fær.; E.S.I.; northern and central Europe, southward to northern
Spain and Hungary. Caucasus.
117. Carex rariflora (Wg.) Smith, Engl. Bot. t. 2516 (1813).
Gliemann, 1824, p. 148.—Drejer, Revisio, 1841, p. 469,—Babington, 1848,
p. 19.—Id., 1871, p. 339.—Gronlund, Isl. Fl., 1881, p. 118.—Stefánsson, Fl.
ísl., ed. 1, 1901, p. 40.—Ibid., ed. 2, 1924, p. 46.—C.H.O., Fl. arct., 1902,
p. 67,—O. & Gr., 1934, p. 38.
Flora Dan. tab. 2432.
Icelandic: Hengistör. Danish: Faablomstret Star. English: Few-flowered Sedge.
Common in all parts, in the lowland as well as the central highland.
Life-form: G. (Rhizome Geophyte).
Marshy bogs, wet meadows, heather moors.
Flor. V—VI; fr. mat. VII—VIII.
Max. height: 32 cm ; average : 17 cm.
Geogr. area: Northern N. Am. Labrador to Hudson Bay, Alaska, southward to
Maine.—Greenl.: W. 60°—73°. E. 60°—74°30'.—Eur.: S.; Scandinavia, N. Russia,
Novaya Zemlya,-—Asia: Northern Siberia, Aleutian Isl., Kamchatka, N. Japan.
118. Carex rigida Good., Trans. Linn. Soc. II (1794) p. 193, tab. 22.1
C. acuta [?], Mohr, 1786, p. 213,—C. saxatilis, Vahl, 1840, p. 375.—Drejer,
Revisio, 1841, p. 459 (inclusive forma a. typica, P. infuscata and y. þudica).—
C. anguillata Drej., 1841, p. 454.—C. hyperborea Drej., 1841, p. 461.—C. rigida
Gooden., Babington, 1871, p. 338.—Gronlund, Isl. Fl., 1881, p. 113.—Ste-
fánsson, Fl. ísl., ed. 1, 1901, p. 43.—Ibid., ed. 2, 1904, p. 49.—C.H.O., Fl.
arct., 1902, p. 77,—O. & Gr., 1934, p. 36.
Flora Dan. tab. 159, tab. 2479 and tab. 2480. (2482).
Icelandic: Stinnastör (Heiðastör). Danish: Stiv Star.
This species is exceedingly variable according to the nature of the habitat: in
dry fell-field and exposed localities in the highland it is low and meagre; in sheltered
places and better soil it becomes tall and robust. The var. Bigelowii (Torr., 1824)
1 The name C. concolor R.Br. is applied to C. rigida by K. K. Mackenzie (N.
Americ. Flora, vol. 18, p. 378, 1935 (see also Fernald, Rhodora, vol. 36, p. 91,
1934), but according to N. Polunin (Canad. Field Naturalist, 51, p. 112, 1937)
the type specimen of C. concolor R.Br. is identical with C. aquatilis var. stans
Boott.