familyAsteraceae
genusMicroseris
speciesMicroseris douglasii
subspeciesMicroseris douglasii subsp. tenella
Microseris douglasii subsp. tenella
Contr. Dudley Herb. 4: 294. 1955.
Common names: Tender silverpuffs
Endemic
Basionym: Calaïs tenella A. Gray in War Department [U.S.], Pacif. Railr. Rep. 4(5): 114, plate 17, figs. 6–10. 1857
Synonyms: Calaïs aphantocarpha A. Gray Microseris aphantocarpha (A. Gray) Schultz-Bipontinus Microseris tenella (A. Gray) Schultz-Bipontinus Microseris tenella var. aphantocarpha (A. Gray) S. F. Blake
Cypselae truncate-fusiform, 3–6.5 mm (tapered to basal callosities, widest beyond middles, filled by embryos), ribs constricted at apices; pappi usually of deltate or ovate, arcuate, usually plane or barely involute scales 0.5–1 mm, shorter than cypselae, sometimes nearly obsolete. 2n = 18.
Phenology: Flowering Mar-–Jun.
Habitat: Sandy or clay soils, flats and hillsides, sometimes on serpentine slopes, grasslands and open oak woodlands
Elevation: 0–500 m
Discussion
Subspecies tenella intergrades completely with subsp. douglasii in west-central California. It occurs near the immediate coast; morphologic variation and chloroplast DNA suggest a history of hybridization with M. bigelovii.
Selected References
None.
Lower Taxa
None.
"fine" is not a number.
... more about "Microseris douglasii subsp. tenella"
tailed +
introrse +
connate +
truncate +
erect +
acute;acuminate +
scarious +
developed +
absent +
hirsute +
papillate +
plumose +
persistent +
falling +
continuous +
decurrent +
linear;oblanceolate +
winged +
ribbed +
1;15 +
filiform +
stigmatic +
barbellate +
coarse +
absent +
petiolate +
absent +
reduced +
Tender silverpuffs +
outer +
monomorphic +
truncate-fusiform +
3mm;6.5mm +
Calif. +
straight +
distinct +
ligulate +
proximal +
5;200 +
bisexual +
dispersed +
Sandy or clay soils, flats and hillsides, sometimes on serpentine slopes, grasslands and open oak woodlands +
subsessile +
singly +
indeterminate +
homogamous +
surrounding +
globose;fusiform +
petiolate +
alternate +
basal +
prickly +
deltate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
shorter +
obsolete +
ebracteate +
inflated +
tough +
thick +
connate +
persistent +
herbaceous +
unequal +
equal +
Contr. Dudley Herb. +
1955 +
epaleate +
glabrous +
pitted +
flat;low-convex +
scabrous +
fibrous +
silvery;yellowish brownish or blackish +
exalbuminous +
modifed +
3;5 +
Endemic +
alternate +
erect +
2-branched +
hirsute +
papillate +
Microseris douglasii subsp. tenella +
Microseris douglasii +
subspecies +
taprooted +
annual +