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FNA | Family List | FNA Vol. 22 | Juncaceae

2c. Luzula subg. Luzula

Luzula sect. Gymnodes Grisebach; Luzula subg. Gymnodes (Grisebach) Buchenau.

Leaves: apex generally callous. Inflorescences spikelike or umbellate. Flowers in glomerules. Seeds usually without tuft of hairs; caruncle conspicuous to barely visible.

Species ca. 50 (15 species in the flora): temperate and arctic regions and tropical mountains.

SELECTED REFERENCES

BocherBöcher, T. W. 1950. Contributions to the flora and plant geography of west Greenland II. Meddel. Grønland 1477 (7): 11--23. Jarolimova, V. and Kirschner, J. 1995. Tetraploids in Luzula multiflora (Juncaceae) in Ireland. Folia Geobot. Phytotax. 30: 389--96. Kirschner, J. 1993. Taxonomic sSurvey of Luzula sect. Luzula (Juncaceae) in Europe. Folia Geobot. Phytotax. 28: 141--182. Kirschner, J. 1990. Luzula multiflora and allied species (Juncaceae). A nomenclatural study. Taxon 39: 106--114. Nordenskiöld, H. 1956. Cyto-taxonomical studies in the genus Luzula. II. Hybridization experiments in the campestris---multiflora complex. Hereditas (Lund) 42: 7--73. Novikov, V. S. 1990. Konspekt sistemy roda Luzula DC. (Juncaceae). (Survey of the system of the genus Luzula).) Byjull. Moskovsk. Obshch. Ispyt. Prir., Otd. Biol. 95 (6): 63--70.


1 Inflorescences dense, spikelike, though often interrupted, nodding   9 Luzula spicata
+ Inflorescences of distinct glomerules, not spikelike, sometimes lax but not nodding.   (2)
       
2 (1) Inflorescences of sessile glomerules only or with smaller glomerules on short branches.   (3)
+ Inflorescences with central glomerule(s) sessile or nearly sessile, always with other pedunculate glomerules.   (8)
       
3 (2) Proximal inflorescence bract conspicuous, usually well-exceeding inflorescence.   (4)
+ Proximal inflorescence bract inconspicuous.   (7)
       
4 (3) Seeds 1.3 mm, caruncle absent.   10 Luzula subcapitata
+ Seeds 0.8--1.5 mm, with caruncle.   (5)
       
5 (4) Seeds 0.8 mm, caruncle 0.2 mm   11 Luzula orestera
+ Seeds 0.9--1.5 mm, caruncle either barely visible or at least 0.3 mm.   (6)
       
6 (5) Capsules ovoid; caruncle barely visible.   12 Luzula groenlandica
+ Capsules spheric; caruncle 0.3-0.8 mm   13 Luzula comosa
       
7 (3) Tepals shorter than capsule; bracteoles deep brown, dentate   14 Luzula arctica
+ Tepals and capsule about equal; bracteoles clear to deep brown, conspicuously fimbriate   15 Luzula confusa
       
8 (2) Inflorescence branches straight.   (9)
+ Inflorescence branches arching.   (14)
       
9 (8) Inflorescence branches mostly erect; glomerules mostly cylindric.   (10)
+ Inflorescence branches divergent as much as 90°; glomerules not cylindric.   (12)
       
10 (9) Tepals pale or with brown central area at maturity; seeds 0.7--1 mm; caruncle 0.2--0.3 mm   16 Luzula pallidula
+ Tepals pale brown to chestnut brown to blackish at maturity; seeds 0.9--1.7 mm; caruncle 0.2--0.7 mm.   (11)
       
11 (10) Seeds 1.1--1.7 mm; caruncle 0.2--0.6 mm   17 Luzula multiflora
+ Seeds 0.9--1.3 mm; caruncle 0.5--0.7 mm   18 Luzula bulbosa
       
12 (9) Leaves with callous apex; glomerules sessile to congested to spreading.   (13)
+ Leaves without callous apex, glomerules on elongate peduncles   20 Luzula echinata
       
13 (12) Stolons slender and short, conspicuous rhizomes present   19 Luzula campestris
+ Stolons or conspicuous rhizomes absent.   13 Luzula comosa
       
14 (8) Inflorescence branches arching in all directions; basal leaf sheaths bluish green   23 Luzula subcongesta
+ Inflorescence branches arching in 1 direction; basal leaf sheaths variously colored.   (15)
       
15 (14) Basal leaf sheaths dull brown-gray to green; cauline leaves as large or larger than basal leaves   22 Luzula kjellmaniana
+ Basal leaf sheaths shining reddish to brown to purple; cauline leaves usually smaller than basal leaves.   (16)
       
16 (15) Basal and cauline leaves not reaching inflorescence   21a subsp. unalaschkensis
+ Basal and especially cauline leaves often reaching or exceeding inflorescence   15 Luzula confusa


 

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