Limnanthes douglasii subsp. douglasii

IllustratedEndemic
Treatment appears in FNA Volume 7. Treatment on page 177. Mentioned on page 174, 176, 178.

Leaflets: blade linear to ovate, margins entire, irregularly toothed, or lobed. Flowers cup or bell-shaped; sepals narrowly lanceolate-ovate, 6–9 mm; petals yellow with white-tips (veins yellow), obovate-cuneate, 12–18 mm, (apex deeply emarginate); filaments 6–7 mm; anthers cream, yellow, or reddish-brown, oval, 1.1–1.5 mm. Tubercles absent or not (or 1 row of whitish globules on ridges and crests), brown, lamellar, planar, or conical. 2n = 10.


Phenology: Flowering Mar–Jun.
Habitat: Wet meadows
Elevation: 0-700 m

Discussion

Subspecies douglasii is common in vernal pools and moist areas in the Coast Ranges from San Benito County to Humboldt County in California, and in the Umpqua Valley. A disjunct population occurs in the Sierra Nevada foothills near Honcut in Butte County, California.

R. V. Kesseli and S. K. Jain (1984b) found clusters of populations in the Inner Coast Ranges, predominantly Mendocino and Lake counties (“inland”), that they considered to be intermediate between Limnanthes douglasii subspp. douglasii and nivea, and clusters of those two subspecies plus subsp. sulphurea in coastal areas (“coastal”). Inland plants had open, usually smaller flowers than the coastal group, with petals ca. 13 mm, white or pale, or dark yellow-centered, the yellow extending from the base over half of the petal length and fading to white, and apical notch rounded. These populations flowered later and had narrower leaflets than the coastal cluster. The coastal cluster had a high frequency of one allele that was absent in the inland cluster. The coastal group had larger flowers, petals ca. 14.7–16 mm, obcordate, completely dark yellow- to yellow-centered (the yellow extending from the base less than half the length of the petal, sharply demarcated from the white part) or white, with earlier flowering and broader leaflets. These studies indicate that the easily recognizable flower color patterns used to characterize subsp. douglasii may not reflect genetic affinities. Additional research is warranted. Kesseli and Jain found also that the Oregon populations of subsp. douglasii had alleles that were rare or nonexistent in all other subspecies of L. douglasii, and that these populations had distinctive nutlets (possibly more similar to L. bakeri and L. vinculans) and shorter stamens and styles than usual in subsp. douglasii.

Selected References

None.

Lower Taxa

None.
tetrasporangiate +
reddish-brown +, yellow +  and cream +
extrorse +, introrse +  and dehiscing +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
obcordate +  and truncate +
Nancy R. Morin +
R. Brown +
ternate +  and bipinnate +
lobed +  and entire +
linear +  and ovate +
Calif. +  and Oreg. +
0-700 m +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
bell--shaped +
ridged +, subglobose +  and obovoid +
rugulose +, smooth +  and tuberculate +
Wet meadows +
lobed +, toothed +  and entire +
gray +, black +  and dark-brown +
tuberculate +
syncarpous +  and 2-5-carpellate +
5-lobed +
distinct +
usually longer +
obovate-cuneate +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Flowering Mar–Jun. +
colporate +, colpate +  and binucleate +
2-4-aperturate +
London Edinburgh Philos. Mag. & J. Sci. +
whitish +, gray +, pinkish +  and brown +
blunt +, rounded +, conical +  and planar +
not arillate +
persistent +
list +  and count +
lanceolate-ovate +
not accrescent +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Illustrated +  and Endemic +
10 +  and 8 +
sprawling +  and decumbent +
ascending +  and erect +
0.3 cm3 mm <br />0.003 m <br /> (?) +  and 0.8 cm8 mm <br />0.008 m <br /> (?) +
Limnanthes sect. Reflexae +
Limnanthes douglasii subsp. douglasii +
Limnanthes douglasii +
subspecies +
conical +  and planar +
pale-yellow +, chartreuse +, pink +, lilac +, drying +, cream +, white +, rose +, purplish +  and translucent +
35 cm350 mm <br />0.35 m <br /> (100 cm1,000 mm <br />1 m <br />) +
pubescent +  and glabrous +