Holodiscus microphyllus var. microphyllus

Treatment appears in FNA Volume 9. Treatment on page 420. Mentioned on page 421.

Short-shoot leaf surfaces sessile and/or stipitate-glandular, abaxial gray to off-white, veins, intercostal regions, and margins frequently obscured by hairs, tomentose to villous, often with white to gray granular deposits, adaxial puberulent, short-hirsute, velutinous to villous, sometimes hairs very short and surface appearing green to gray-green. Inflorescences 2–9 × 1–7 cm. Pedicels 2–3 mm. Flowers: nectar disc slightly pilose to puberulent, sometimes glabrous; sepals densely pilose to tomentose, usually eglandular; petal base abaxially with few, scattered long hairs.


Phenology: Flowering Apr-–Aug.
Habitat: Rock outcrops, rocky sites in sagebrush and bitterbrush shrublands, edges of talus slopes
Elevation: 500-–3100 m

Distribution

V9 707-distribution-map.jpg

Ariz., Calif., Colo., Idaho, Nev., Oreg., Utah, Wyo., Mexico (Baja California)

Discussion

Variety microphyllus has the widest range of the varieties. Individual populations are generally small and isolated.

Selected References

None.

Lower Taxa

None.

"chartaceous" is not a number.

white +  and whitish +
stipitate-glandular +, sericeous +, tomentose +  and villous or sericeous +
beige +  and gray +
stipitate-glandular +, hirsute +  and hispid +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
sessile-glandular +  and stipitate +
villous +, velutinous +, puberulent +, glabrate +, glabrous +  and short-hirsute +
velutinous +  and villous +
villous +, sessile-glandular +  and glabrate +
Richard Lis +
Rydberg +
light +  and dark gray or nearly black +
exfoliating +
compound +  and simple +
opposite +  and alternate +
cuneate +, decurrent +  and acute +
Holodiscus +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
obtrullate +, broadly obovate +  and more or less ovate +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1cm +  and 2cm +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
sessile-glandular +  and stipitate +
puberulent +  and tomentose +
hispid +  and hirsute +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Ariz. +, Calif. +, Colo. +, Idaho +, Nev. +, Oreg. +, Utah +, Wyo. +  and Mexico (Baja California) +
not +  and aggregated +
500-–3100 m +
exfoliating +
puberulent +  and tomentose +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
unisexual +  and bisexual +
dolabriform +  and flattened +
not +  and aggregated +
not +  and aggregated +
Rock outcrops, rocky sites in sagebrush and bitterbrush shrublands, edges of talus slopes +
sessile-glandular +  and stipitate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
2cm +  and 9cm +
pendulous +  and erect +
1cm +  and 7cm +
crassinucellate +
compound +  and simple +
deciduous +
stipitate-glandular +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
round +  and angled +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
simple-craspedodromous +
serrate +  and entire +
tomentose +  and villous +
toothed +, unlobed +  and lobed +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and apical +
tomentose +, villous +, puberulent +  and glabrate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dark red +, maroon +  and shiny +
0 (?) +  and 4 (?) +
free +  and distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flowering Apr-–Aug. +
adnate +, free +, connate +  and distinct +
Bull. Torrey Bot. Club +
not arillate +
persistent +
free +  and distinct +
erect +  and spreading or slightly reflexed +
densely pilose +  and tomentose +
triangular +  and deltate +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
pilose-tomentose +, canescent +, downy +, glabrate +  and glabrous +
pleated +, angled +  and long +
0.2 cm2 mm <br />0.002 m <br /> (3 cm30 mm <br />0.03 m <br />) +
free +  and distinct +
2.5mm +  and 3mm +
branched +  and simple +
erect +  and arching +
1 +  and 10 +
persistent +  and deciduous +
distinct +
basal +, lateral +, subterminal +  and terminal +
not elongate +
green +  and gray-green +
Holodiscus discolor subsp. microphyllus +  and H. discolor var. microphyllus +
Holodiscus microphyllus var. microphyllus +
Holodiscus microphyllus +
variety +
inconspicuous +
thickened +  and minute +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
erect +  and spreading +