Cimicifuga arizonica

S. Watson

Proc. Amer. Acad. Arts 20: 352. 1885.

Common names: Arizona bugbane
Conservation concernEndemic
Treatment appears in FNA Volume 3.

Stems 70-150 cm, glabrous. Leaves: petiole rounded abaxially, 10-35 cm, usually deeply and broadly grooved adaxially, glabrous. Leaf-blade 2 (-3) -ternately compound; leaflets (9-) 21-45; terminal leaflet of central segment ovate or oblong-ovate, 3-lobed, 8-17.5 × 6-12.5 cm, with 3 prominent veins arising basally, base somewhat cordate, margins serrate to dentate-serrate, teeth gland-tipped, apex acuminate, rarely nearly truncate, surfaces nearly glabrous; other leaflets 7-12 × 4-7 cm. Inflorescences erect to lax panicles of 2-8 racemelike branches, 10-45 cm, short-pubescent distally; bracts 3, subtending pedicel, central bract larger and elongate-subulate, 3-4 mm, lateral bracts ovate-deltate; pedicel to 8 mm, pubescent, bracteoles absent. Flowers: sepals 5, outer 2 greenish yellow, inner creamy white; petals (0-) 2, white, ovate to obovate, 3 mm, long-clawed; nectary absent; stamens 40-75; filaments 5-8 mm; pistils 1-3 (-4), sessile, glandular; style long, hooked; stigma minute, 0.2 mm wide. Follicles (1-) 2 (-3), sessile, oblong, ± compressed laterally, 10-18 mm, membranous walled. Seeds pale-brown, lenticular, covering of scales giving cylindric appearance, 2.5-3 mm, loosely covered with pale-brown, membranous scales.


Phenology: Flowering summer (Jul–Aug).
Habitat: Rich soil and deep shade in moist wooded ravines
Elevation: 1600-2100 m

Discussion

Of conservation concern.

Cimicifuga arizonica is known from only a few localities in central Arizona. It grows in moist, loamy soil of the ecotone between the coniferous forest and the riparian habitat and does not spread into the forest. It appears to be adapted to deep shade.

Selected References

None.

Lower Taxa

None.
... more about "Cimicifuga arizonica"
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Gwynn W. Ramsey +
S. Watson +
cordate +
straight +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
racemelike +
globose;cylindric +
elongate-subulate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Arizona bugbane +
1600-2100 m +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
sessile +  and pedicellate +
showy +  and inconspicuous +
walled +  and sessile +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
stipitate +, sessile +  and aggregate +
ovoid +  and obovoid +
Rich soil and deep shade in moist wooded ravines +
axillary +  and terminal +
ovate-deltate +
petiolate +  and compound +
whorled +, opposite +  and alternate +
cauline +  and basal +
7 cm70 mm <br />0.07 m <br /> (12 cm120 mm <br />0.12 m <br />) +
2-5-lobed +, ovatelanceolate +  and broadly obovate or orbiculate +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
incised +  and toothed +
palmate +  and pinnate +
incised;toothed;incised;toothed;entire +
serrate to dentate-serrate +
greenish yellow +
many-flowered +
short-pubescent +
10 cm100 mm <br />0.1 m <br /> (45 cm450 mm <br />0.45 m <br />) +
0 cm0 mm <br />0 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
distinct +
conspicuous +
Long-clawed (?) +, Ovate (?) +  and Obovate (?) +
reduced +
3 cm30 mm <br />0.03 m <br /> (?) +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
Flowering summer (Jul–Aug). +
1 +  and 3 +
Proc. Amer. Acad. Arts +
membranous +
not arillate +  and stalked +
verrucose +
lenticular +
8 cm80 mm <br />0.08 m <br /> (17.5 cm175 mm <br />0.175 m <br />) +
3-lobed +, oblong-ovate +  and ovate +
6 cm60 mm <br />0.06 m <br /> (12.5 cm125 mm <br />0.125 m <br />) +
tinged with red;pinkish;cream;greenish yellow +
not persistent +
distinct +
more or less concave ovate +  and obovate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Conservation concern +  and Endemic +
70 cm700 mm <br />0.7 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
persistent +
Cimicifuga arizonica +
Cimicifuga +
species +
gland-tipped +
herbaceous +  and woody +