Juncaceae Phylogeny Group
Luzula -
KEY
TO SUBGENERA AND SECTIONS
1
Annuals; inflorescence cymose; n = 3
subg. 1. Marlenia
1:
Perennials; inflorescence racemose; n = 6
2
Seed appendage apical (distal),
large
subg. 3. Pterodes
2:
Seed appendage basal or absent, distal end of seed sometimes with a
minute pale
patch of loose outer seed coat
3
Flowers usually borne singly, in the inflorescence rarely
some in groups
of 2–5, inflorescence much
branched
sect. 4. Diprophyllatae
3:
Flowers in dense pedunculate clusters or wholly congested, or in groups
of (2)
3–5 (to many) flowers in the whole inflorescence;
inflorescence sparsely
branched, unbranched or much branched
4
Leaf tip obtuse to subobtuse, often slightly swollen,
rarely with a
spinuliform mucro
5
Leaf tip obtuse, not swollen, with a spinuliform mucro
49.
Luzula
nivalis
5:
Leaf tip obtuse or subobtuse, slightly swollen or not swollen, without
spinuliform mucro
sect. 7. Luzula
4:
Leaf tip acute to acuminate, not swollen
6
Inflorescence usually nodding, less often erect (then
stamens 3 or tepals
ciliate, high Andes), spike-like or paniculate (a panicle of
±dense spike-like
clusters), clusters congested or interrupted at base
sect. 5. Alpinae
6:
Inflorescence erect to suberect, if slightly nodding then much
branched, loose,
of (2) 3–5 (20)-flowered groups, anthelate (or corymbose) or
umbelloid, of
distinct clusters (if congested then stamens 6, tepals glabrous, N
hemisphere)
7
Inflorescence much branched, (doubly) anthelate, terminal
groups mostly
of 2–4 (8) flowers, head-like sect.
1. Antheleae
7:
Inflorescence sparsely branched or unbranched, umbelloid to
subcongested, of
distinct pedunculate clusters (or wholly contracted), clusters
3–8 (-many)-flowered
8
Tepals ±membranous, seeds ±globose,
smooth
sect. 2. Atlanticae
8:
Tepals coloured (usually castaneous-brown), seeds broadly ovoid to
ellipsoid,
surface sculptured
9
Seeds 0.9–1.3 × 0.5–0.3 mm;
rhizome thin or indistinct
10
Leaf margin smooth 91.
L.
acutifolia
10:
Leaf margin densely papillose-serrulate
sect. 6. Thyrsanochlamydeae
9:
Seeds 1.7–1.9 × 1.3–1.4 mm; rhizome
thick, nodulose
sect. 3. Nodulosae
|
|
|
|
|
|
|
