Microseris paludosa
Microseris douglasii
marsh microseris, marsh scorzonella, marsh silverpuffs
Douglas' microseris, Douglas' silverpuffs
branched proximally, leafy proximally.
basal and cauline; petiolate (petioles broadly winged, clasping);
blades linear to oblanceolate, 6–35 cm, margins entire, dentate, or pinnately lobed, apices acuminate.
basal; petiolate;
blades linear to oblanceolate, 3–25 cm, margins entire, dentate, or pinnately lobed (lobes slender, tapering), apices acute to acuminate, faces ± scurfy-puberulent.
erect or arcuate-ascending (15–50 cm), ebracteate.
erect or curved-ascending, ebracteate.
ovoid in fruit, 10–20 mm.
globose to fusiform in fruit, 7–16 mm.
25–70;
corollas yellow-orange, surpassing phyllaries by 5+ mm.
5–200;
corollas yellow or white, equaling or surpassing phyllaries by 1–3 mm.
not spotted, abaxial faces usually scurfy-puberulent, usually black-villous;
outer linear to broadly or narrowly ovate-deltate, apices erect or recurved, acuminate;
inner lanceolate, apices erect, acute to acuminate.
apices erect, acute to acuminate;
outer deltate, glabrous or lightly scurfy-puberulent;
inner lanceolate, faces often lightly black-villous on margins (midveins often purple-lined, thickened).
columnar, 4–7 mm;
pappi of 5–10, dull yellowish brown, lanceolate, glabrous, aristate scales 2–4 mm, aristae barbellate.
columnar or obconic, 3–10 mm;
pappi of (0–)1–5, white to yellow, brown, or blackish, aristate scales 0.5–7 mm (± arcuate, usually distinctly involute, except subsp. tenella, often abaxially villous, midveins usually tapering distally from thick bases, except subsp. tenella, widths less than 1/5 bodies), aristae (white or straw-colored, ± stout) barbellate.
= 18.
= 18.
Microseris paludosa
Microseris douglasii
Microseris paludosa in the central coastal region (D. P. Tibor 2001). It differs from M. laciniata subsp. leptosepala in its longer, brownish pappus scales and more southern coastal distribution. It is unusual among the perennial taxa of Microseris in its self-compatibility and ready self-fertilization in culture.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Subspecies 3 (3 in the flora).
The geographic patterns of morphologic variability as well as both chloroplast and nuclear DNA markers in Microseris douglasii have been studied by K. Bachmann and J. Battjes (1994) and D. Roelofs and K. Bachmann (1997). Four chloroplast types were identified, two of which were derived by introgression from M. bigelovii or its ancestor. Plants in nature are highly inbred and genetically homozygous, as proposed earlier by K. L. Chambers (1955). Subspecies platycarpha stands well apart in these studies; subsp. tenella is not differentiated molecularly from subsp. douglasii.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Pappus scales usually 0.5–1 mm, sometimes nearly obsolete; cypselae truncate-fusiform, ribs constricted at apices; s, w-c California, mainly coastal and Coast Ranges | subsp. tenella |
1. Pappus scales 1–7 mm; cypselae columnar or obconic, ribs slightly flared at apices | → 2 |
2. Pappus scales (glabrous) 0.5 mm shorter to 2 mm longer than cypselae; cypselae obconic or columnar, 3–4.5 mm; sw California, n Baja California | subsp. platycarpha |
2. Pappus scales (glabrous or villous) usually 1–6 mm shorter than cypselae; cypselae columnar (slightly tapered distally), 4–10 mm; widespread in cismontane California, mainly n of the Transverse Ranges | subsp. douglasii |
CA
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USDA Plants Database
OR
Flora NW
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