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Luzula subsessilis

Higher Taxonomy
Family: JuncaceaeView DescriptionDichotomous Key

Common Name: RUSH FAMILY
Habit: Annual, perennial herb generally from rhizomes. Stem: round or flat. Leaf: generally basal; sheath margins fused, or overlapping and generally with 2 ear-like extensions at blade junction; blade round, flat, or vestigial, glabrous or margin hairy. Inflorescence: head-like clusters or flowers 1, variously arranged; bracts subtending inflorescence 2, generally leaf-like; bracts subtending inflorescence branches 1--2, reduced; bractlets subtending flowers generally 1--2, generally translucent. Flower: generally bisexual, radial; sepals and petals similar, persistent, scale-like, green to brown or +- purple-black; stamens generally 3 or 6, anthers linear, persistent; pistil 1, ovary superior, chambers generally 1 or 3, placentas 1 and basal or 3 and axile or parietal, stigmas generally > style. Fruit: capsule, loculicidal. Seed: 3--many, generally with white appendages on 1 or both ends.
Genera In Family: 7 genera, 440 species: temperate, arctic, and tropical mountains. Note: Flowers late spring to early fall.
eFlora Treatment Author: Peter F. Zika, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: LuzulaView DescriptionDichotomous Key

Habit: Perennial herb, cespitose or rhizomatous, rhizome ascending or vertical. Stem: cylindric. Leaf: generally basal, cauline few; blades linear, flat or channeled, margins and sheath opening, sparsely to densely long-soft-hairy. Inflorescence: panicles of 1--few flowers per branch, or head-like and cylindric to ovoid in dense to loose clusters; lower bract leaf-like or herbaceous at base, membranous distally, bractlets 1--3, margins generally ciliate. Flower: perianth parts 6, pale brown to +- black-brown; stamens 6; pistil 1, chamber 1, placenta basal. Fruit: capsule, opening with 3 valves. Seed: 3, elliptic to ovoid, ridged on 1 side, occasionally attached to placenta by tuft of hairs, generally with +- white appendage at tip.
Species In Genus: +- 115 species: worldwide. Etymology: (Latin: light; Italian: glow worm) Note: Measure unridged side of seeds; seed length measurement not including appendage.
eFlora Treatment Author: Jan Kirschner

Luzula subsessilis (S. Watson) Buchenau
Habit: Plant cespitose, 20--30(40) cm; rhizome short; stolons +- 0. Leaf: flat, tip obtuse, thickened; basal leaves +- 7--14 cm, 3--4.5 mm wide, cauline 1--3, (3.5)5--9(11) cm, to +- 4.5 mm wide. Inflorescence: 1--2 clusters +- sessile, (0)1--3(6) peduncled, 0.6--1.3 mm, 0.7--1 mm wide, broadly ovoid to +- cylindric, (3)5--9(13)-flowered; lower bract 1.5--7 cm, generally < (>) inflorescence. Flower: perianth parts (3.1)3.4--4(5) mm, +- equal, lanceolate, acuminate to acute, +- dark chestnut-brown; anthers (1.1)1.5--2 mm, filaments 0.4--0.6 mm; style 0.6--1.2 mm, stigmas 2--3.5 mm. Fruit: < perianth, obovoid, pale brown, +- obtuse; valves +- 2.6--2.9 mm, 1.8--2 mm wide. Seed: 1.2--1.3 mm, 0.9--1.1 mm wide, ovoid-subspheric; appendage 0.2--0.3 mm. Chromosomes: 2n=12.
Ecology: Open, drier woodland; Elevation: < 2600 m. Bioregional Distribution: NCoR, c&s SNF, SNH, CCo; Distribution Outside California: to Alaska. Flowering Time: Apr--Jul Note: Further study needed.
Unabridged Note: A variable complex of populations comprising 2 morphological extremes linked by a majority of intermediates: large-flowered plants with clusters broadly ovoid, dense, and plants with medium-sized flowers in looser clusters. The 2 forms occasionally coexist at a locality. Further population and karyotype research is needed; the whole group of Luzula comosa and Luzula subsessilis is imperfectly known.
eFlora Treatment Author: Jan Kirschner
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Previous taxon: Luzula subcongesta
Next taxon: Juncaginaceae

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botanical illustration including Luzula subsessilis


Citation for this treatment: Jan Kirschner 2016. Luzula subsessilis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 03, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 03, 2016.

Geographic subdivisions for Luzula subsessilis:
NCoR, c&s SNF, SNH, CCo;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.