Part 6. JUNCACEAE 1: Rostkovia to Luzula - Species Plantarum ...

JUNCACEAE (Luzula)
Presumed hybrids
Luzula arcuata (Wahlenb.) Sw. subsp. unalaschkensis (Buchenau) Hultén × L. confusa Lindeb.
Intermediate plants are found at sites with both presumed parents. Up to now known only
from Alaska [L.Hämet-Ahti, Ann. Bot. Fenn. 10: 128 (1973)]. They usually exhibit a partial
seed-sterility.
Luzula arcuata (Wahlenb.) Sw. subsp. arcuata × L. confusa Lindeb.
Plants intermediate between the two taxa are quite common in Greenland, Scandinavia, Finland
and W North Russia. The presumed hybrid plants set normal seeds and require further study.
Unclear Names
Luzula arcuata f. subnivalis Laest., Bot. Not. 1858: 144 (1858).
T: Sweden, Qvickjock [Kvikkjokk], L.L.Laestadius; syn: n.v.
Luzula arcuata f. latifolia Laest., Bot. Not. 1858: 144 (1858).
T: Sweden, Åreskutan, 1819, L.L.Laestadius; syn: n.v.
Luzula hyperborea var. minor Hook., Fl. Bor. Amer. 2: 188 (1840)
Juncoides hyperborea var. minor (Hook.) E.Sheld., Bull. Geol. Nat. Hist. Surv. 9: 64 (1894), n.v. T: n.v.
Sect. 7. LUZULA
Luzula sect. Gymnodes Griseb., Spic. Fl. Rumel. 2: 405 (1846); Gymnodes (Griseb.) Fourr., Ann. Soc. Linn.
Lyon, sér. 2, 17: 172 (1869); Luzula subg. Gymnodes (Griseb.) Buchenau, Bot. Jahrb. Syst. 1: 114 (1880);
Luzula sect. Apterodes Rouy, Fl. France 13: 256 (1912), nom. illeg. T: not designated.
Luzula subsect. Ulea Novikov, Byull. Moskovsk. Obshch. Isp. Prir., Odt. Biol. 95(6): 68 (1990). T: Luzula
ulei Buchenau
Luzula subsect. Caricinae Novikov, Byull. Moskovsk. Obshch. Isp. Prir., Odt. Biol. 95(6): 68 (1990).
T: Luzula caricina E.Mey.
Luzula subsect. Pumilae Novikov, Byull. Moskovsk. Obshch. Isp. Prir., Odt. Biol. 95(6): 69 (1990).
T: Luzula pumila Hook.f.
Luzula subsect. Sibiricae Novikov, Byull. Moskovsk. Obshch. Isp. Prir., Odt. Biol. 95(6): 69 (1990).
T: Luzula sibirica (V.I.Krecz.) V.I.Krecz.
Luzula ser. Inaequales K.F.Wu, J. E. China Norm. Univ., Nat. Sci. Ed., 1992(3): 97 (1992)
Perennials. Leaves with obtuse, usually slightly swollen tips. Lower bract herbaceous.
Inflorescence wholly congested or umbelloid, decompound, of one to numerous spike- or
head-like clusters each usually 3–many-flowered. Seed appendage basal, usually conspicuous,
0.1–0.8 mm long, fibrillate or not so. Diploids, true polyploids and complete or partial
agmatoploids.
A section of 57 species with several diversity centres in Europe, the Far East, Australia, New
Zealand, W North America and S America, grouped in this treatment by their regions of
predominant occurence. There is a very low level of major structural differentiation within
the section, and many taxa are difficult to distinguish from one another. In some regions
(W North America, China) the section is in need of taxonomic revision.
Successful identification by means of the following key requires careful measurement of
well developed material, preferably of more than a single plant. Method of measurement, as
given in the introductory part to the genus, should be observed.
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