Adenostoma fasciculatum

Hooker & Arnott

Bot. Beechey Voy., 139. 1832.

Common names: Greasewood
Illustrated
Treatment appears in FNA Volume 9. Treatment on page 393.

Plants decumbent or erect-ascending, 8–20 dm. Stems erect to arching; young stem internodes brown, 2–6.5 (–12) mm, glabrous or hirtellous-pilose, rarely glandular. Leaves crowded on short-shoots; stipules green, 0.5–1.5 mm on long-shoot leaves, smaller on fascicled leaves; blade dark green, linear-oblanceolate, (2–) 3–10 (–13) × 0.6–1 (–1.7) mm, apex acute, apiculate to obtuse, abaxial surface glabrous or hirtellous or villous, adaxial glabrous. Inflorescences of alternately branched pyramidal panicles, 3.5–10 (–17) × 1–9 (–15) cm or reduced to cylindric racemes or spikes, glabrous; subtending flower bracts 3-lobed, medial lobe largest; bracteoles 2, subulate. Pedicels present, short. Flowers in clusters of 1–3 (–7); hypanthium green, 1.5–2.4 × 1–1.6 (–2) mm, obscurely 10-veined, conspicuously so when dry, glabrous or weakly hirtellous, inner rims whitish; sepals broadly ovate to semiorbiculate, 0.5–0.9 mm; petals tardily falling, white, turning rusty, obovate-orbiculate, to 1–2 mm diam.; stamens (10–) 15, filaments 1–1.5 mm, anthers 0.4–0.8 mm; ovaries obconic; styles curved over ovary, erect distally, white, rarely pinkish distally, 1–1.4 mm. Achenes obovoid, 1.2–1.8 (–2.4) mm, contained within hypanthium.

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Stems decumbent (plants low, mounded); insular. Adenostoma fasciculatum var. prostratum
1 Stems erect-ascending, spreading (plants tall); mainland and insular > 2
2 Young stems glabrous, sometimes +/- hirtellous; leaves oblanceolate to linear, (2.5–)5–13 mm, apices acute-apiculate. Adenostoma fasciculatum var. fasciculatum
2 Young stems pubescent to villous; leaves oblanceolate-clavate, 4–6.5 mm, apices usually obtuse. Adenostoma fasciculatum var. obtusifolium
... more about "Adenostoma fasciculatum"
villous +, hirtellous +  and glabrous +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
1.2mm +  and 1.8mm +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
William Jones +  and James Henrickson +
Hooker & Arnott +
compound +  and simple +
opposite +  and alternate +
persistent +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
linear-oblanceolate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
? (?) +  and ? (?) +
0.6mm +  and 1mm +
sericeous +  and glabrous +
opposite +  and alternate +
mature +  and juvenile +
1-2-pinnatifid +
Greasewood +
Calif. +  and nw Mexico +
not +  and aggregated +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
ellipsoid +  and obovoid +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
hirtellous +  and glabrous +
undulate +  and annular +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
hirtellous +  and glabrous +
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
10 cm100 mm <br />0.1 m <br /> (17 cm170 mm <br />0.17 m <br />) +
9 cm90 mm <br />0.09 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3.5cm +  and 10cm +
1cm +  and 9cm +
crassinucellate +
red brownish +
persistent +
toothed +, unlobed +  and lobed +
inferior +  and superior +
obconic +
biseriate +  and clustered +
collateral +  and basal +
pyramidal +
0 (?) +  and 4 (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
free +  and distinct +
adnate +, free +, connate +  and distinct +
Bot. Beechey Voy., +
hirtellous +  and glabrous +
cylindric +
reduced +
not arillate +
persistent +
free +  and distinct +
spreading +, erect +  and reflexed +
broadly ovate +  and semiorbiculate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
glabrous +, pilose +  and hirtellous +
Illustrated +
hirtellous +  and glabrous +
cylindric +
reduced +
free +  and distinct +
grooved +  and branched +
0.65 cm6.5 mm <br />0.0065 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
hirtellous-pilose +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
erect +  and arching +
1 +  and 10 +
capitate +  and truncate +
adnate +  and free +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
pinkish +  and white +
not persistent +
distinct +
not elongate +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Adenostoma fasciculatum +
Adenostoma +
species +
inconspicuous +
erect-ascending +  and decumbent +