Malacothrix saxatilis var. tenuifolia

(Nuttall) A. Gray in A. Gray et al.

in A. Gray et al., Syn. Fl. N. Amer. 1(2): 423. 1884.

Endemic
Basionym: Leucoseris tenuifolia Nuttall Trans. Amer. Philos. Soc., n. s. 7: 440. 1841
Synonyms: Malacothrix saxatilis var. altissima (Greene) Ferris
Treatment appears in FNA Volume 19. Treatment on page 319. Mentioned on page 318.
Revision as of 19:21, 29 July 2020 by imported>Volume Importer
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Plants with woody caudices. Herbage glabrous or sparsely hairy (floccose). Stems 1–3+, erect, branched distally, herbaceous, relatively sparsely leafy distally. Cauline leaves: proximal usually 1-pinnately lobed (lobes lanceolate to linear or filiform, sometimes antrorse, apices acute); distal linear to filiform (or pinnately lobed, lobes linear to filiform), ultimate margins entire, apices acute. Arrays of heads relatively open. Cypselae 1.4–2 mm. 2n = 18.


Phenology: Flowering Mar–Dec.
Habitat: Canyons, coastal-sage scrub, chaparral
Elevation: 10–2000 m

Discussion

Variety tenuifolia occurs in the Transverse Ranges (Santa Monica, Santa Ynez, San Gabriel, and San Bernardino mountains), south to coastal areas in Orange and San Diego counties, and east to San Bernardino and Riverside counties, and on Santa Catalina Island with var. saxatilis. Single populations grow on San Clemente and San Nicolas islands on mounds of sand brought from the mainland.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."]" is not declared as a valid unit of measurement for this property.

scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
W. S. Davis +
(Nuttall) A. Gray in A. Gray et al. +
decurrent +
Leucoseris tenuifolia +
compound +  and simple +
lanceolate;obovate oblanceolate or spatulate +
tuberculate +, rugose +, muricate +  and smooth +
lanceolate;subulate +
subequal +  and unequal +
filiform +
zygomorphic +, actinomorphic +  and (3-)5-merous +
1.3 cm13 mm <br />0.013 m <br /> (2 cm20 mm <br />0.02 m <br />) +
fimbriate +
stramineous +  and brown or purplish brown +
prismatic +
linear +  and filiform +
10–2000 m +
glabrescent +, arachnose +, glabrous +, more or less arachnose +  and tomentose +
winged +  and beaked +
dispersed +
Canyons, coastal-sage scrub, chaparral +
indeterminate +
hairy +  and glabrous +
each +  and sessile +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cauline +  and basal +
divided +, lobed +  and dentate +
0.05mm +  and 0.2mm +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
2-carpellate +
persistent +
Flowering Mar–Dec. +
connate +  and distinct +
18 +  and 30 +
subequal +  and unequal +
in A. Gray et al., Syn. Fl. N. Amer. +
flat;more or less convex +
more prominent +
crenate +
exalbuminous +
leafy +  and branched +
sparsely arachnose +  and tomentose +
1 +  and 3 +
appendaged +  and truncate +
papillate +
Malacothrix saxatilis var. altissima +
Malacothrix saxatilis var. tenuifolia +
Malacothrix saxatilis +
variety +
20 cm200 mm <br />0.2 m <br /> (90 cm900 mm <br />0.9 m <br />) +
90 cm900 mm <br />0.9 m <br /> (200 cm2,000 mm <br />2 m <br />) +