Stylocline masonii
Mason neststraw, Mason's neststraw
blunt, not mucronate, longest 5–9 mm;
largest capitular leaves linear-oblong to narrowly elliptic, 2–5 × ± 1 mm.
± cylindric, 2–3 mm, heights 5–8 times diams.;
scars concentrated proximally and distally, raised, peglike.
0, vestigial, or falling, ± subulate, mostly 0.1–0.5 mm, unequal.
in dichasiform or proximally racemiform arrays, ± ellipsoid, largest 2–5 × 1.5–2.5 mm, thinly lanuginose.
0.7–1 mm, obcompressed;
pappi: staminate 0 or of 1 smooth bristle 0.7–1 mm.
paleae: longest 2–2.7 mm, winged distally;
wings oblanceolate to oblacrimate, widest in distal 1/3 of palea lengths;
bodies cartilaginous;
outermost paleae open, concave.
staminate florets 2–4;
ovaries vestigial, 0–0.1 mm;
corollas 0.8–1.1 mm (lobes usually 4).
Stylocline masonii
Of conservation concern.
Stylocline masonii is known from the southern San Joaquin Valley and adjacent mountains of Kern, Los Angeles, Monterey, and San Luis Obispo counties. Reportedly, it is in identifiable condition for only 2–4 weeks in wet years. On average, it is the least conspicuous Stylocline.
Stylocline masonii is sister to, and largely allopatric with, S. psilocarphoides (J. D. Morefield 1992), from which it remains distinct when sympatric (T. S. Ross and S. Boyd 1996).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
