Asarum hartwegii

S. Watson

Proc. Amer. Acad. Arts 10: 346. 1875.

EndemicIllustrated
Treatment appears in FNA Volume 3.

Rhizomes erect or ascending, deeply buried, internodes 0.2-1.3 cm. Leaves: petiole 9-21 cm, sparsely crisped-hirsute. Leaf-blade almost always variegate with white or silver along veins, cordate to cordate-reniform, 5.3-10 × 7-14 cm, apex rounded-acute to rounded; surfaces abaxially appressed-hirsute, usually sparsely so, adaxially glabrous or sparsely hirsute along veins, marginal hairs strongly curved toward apex. Flowers erect; peduncle 1-2. calyx-tube cylindric, externally reddish, sometimes mottled red and green, hirsute, internally white with brownish purple stripes and white hairs (becoming brown with age); distal portion of sepal usually spreading at anthesis, sometimes reflexed or nearly erect, 12-27 mm, apex filiform-attenuate, abaxially reddish, hirsute, adaxially reddish, puberulent with crisped pale hairs; pollen-sacs 2 mm, sterile tip of connective on inner stamens pale (sometimes dark in dried specimens), 3-5 mm, longer than pollen-sacs. 2n = 26.


Phenology: Flowering spring–summer (Apr–Jul).
Habitat: Rocky slopes in dry conifer or oak forests
Elevation: 150-2200 m

Discussion

Asarum hartwegii was confused with A. marmoratum until very recently; reports of A. hartwegii from southern Oregon are errors for A. marmoratum (M. R. Mesler and K. L. Lu 1990).

Selected References

None.

Lower Taxa

None.

"broad" is not a number.

... more about "Asarum hartwegii"
erect +  and reflexed +
1.2 cm12 mm <br />0.012 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
Alan T. Whittemore +, Michael R. Mesler +  and Karen L. Lu +
S. Watson +
white +, mottled red and green +  and reddish +
merous +  and petaloid +
tubular +
enlarged +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
fan--shaped +
150-2200 m +
sessile +  and petiolate +
indehiscent +  and loculicidal +
Rocky slopes in dry conifer or oak forests +
pale +  and white +
crisped +
axillary +  and terminal +
with weak longitudinal ribs +  and smooth +
0.2 cm2 mm <br />0.002 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
5.3 cm53 mm <br />0.053 m <br /> (10 cm100 mm <br />0.1 m <br />) +
leathery;membranous +
7 cm70 mm <br />0.07 m <br /> (14 cm140 mm <br />0.14 m <br />) +
petiolate +  and simple +
2-ranked +  and alternate +
parietal +, axile +  and placentation +
crisped-hirsute +
9 cm90 mm <br />0.09 m <br /> (21 cm210 mm <br />0.21 m <br />) +
Flowering spring–summer (Apr–Jul). +
4-6-carpellate +
2 cm20 mm <br />0.02 m <br /> (?) +
Proc. Amer. Acad. Arts +
ascending +  and erect +
purple +  and red +
distinct +
puberulent +  and hirsute +
Endemic +  and Illustrated +
brownish purple +
hirsute +, glabrous +  and appressed-hirsute +
Asarum hartwegii +
species +
silver +  and white +
deciduous +  and perennial +