Erigeron acris var. kamtschaticus

(de Candolle) Herder

Bull. Soc. Imp. Naturalistes Moscou 38: 392. 1865.

Common names: Vergerette du Kamtchatka
Basionym: Erigeron kamtschaticus de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 290. 1836 (as kamtschaticum)
Synonyms: Erigeron acris subsp. kamtschaticus (de Candolle) H. Hara Erigeron yellowstonensis (Linnaeus) Gray Trimorpha acris var. kamtschatica (de Candolle) G. L. Nesom
Treatment appears in FNA Volume 20. Treatment on page 321. Mentioned on page 322.

Annuals, biennials, or short-lived perennials, 20–60 (–80) cm; usually fibrous-rooted, sometimes apparently taprooted, slender caudices simple or branched. Stems erect, sparsely to moderately strigose or loosely strigoso-villous or nearly glabrous, often also minutely glandular distally. Leaves basal (persistent) and cauline; blades oblanceolate to spatulate, 20–140 × 3–16 mm, cauline spreading, gradually reduced distally, margins usually entire, rarely serrate-dentate, faces glabrous or sparsely villoso-hirsute, distal sometimes also glandular. Heads 1 or 3–35 in corymbiform to thyrsiform arrays (peduncles curved-ascending). Involucres 5–11 × 8–22 mm. Phyllaries in 2–3 (–4) series (often purplish, inner apices attenuate to caudate), glabrous or sometimes sparsely hirsute, minutely glandular. Ray (pistillate) florets in 2 series; outer 150–250, corollas white to pink or purplish, laminae 3–4.5 mm (filiform), erect; inner fewer than outer, corollas tubular, elaminate. Disc corollas 4.2–6.2 mm. Cypselae 2–2.4 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of (18–) 25–35 (accrescent) bristles. 2n = 18.


Phenology: Flowering Jun–Aug(–Sep).
Habitat: Rocky and sandy sites, riverbanks, roadsides, and other disturbed sites
Elevation: 900–3100 m

Distribution

V20-722-distribution-map.gif

Alta., B.C., Man., N.B., Nfld. and Labr. (Labr.), N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Colo., Idaho, Maine, Mich., Minn., Mont., S.Dak., Utah, Wash., Wyo., e Asia (Russian Far East)

Discussion

Erigeron angulosus Gaudin, E. asteroides Andrzejowski ex Besser, E. droebachiensis O. F. Mueller ex Retzius, E. elongatus Ledebour, and E. politus Fries, names previously used for the widespread American plants of var. kamtschaticus, refer to Eurasian endemics (summary in G. L. Nesom 2004e). E. Hultén (1968) restricted the name var. kamtschaticus to a single North American collection made at “Junction Firth R. and Mancha Creek on the Alaska-Yukon boundary in August 1961,” treating all others of the species in North America as subsp. politus. Entire-leaved plants apparently are the common form of the species even in the Kamtschatka area, and var. kamtschaticus appears to be correct at varietal rank for the North American plants. Erigeron kamtschaticus has been treated as a species separate from E. acris in other recent literature. Circumscription and rank of E. acris and closely related taxa are in need of study.

Erigeron lapiluteus A. Nelson is not a legitimate name.

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and thyrsiform +
indeterminate +  and determinate +
Guy L. Nesom +
(de Candolle) Herder +
decurrent +
Erigeron kamtschaticus +
2 cm20 mm <br />0.02 m <br /> (14 cm140 mm <br />0.14 m <br />) +
oblanceolate;spatulate +
3mm;16mm +
rugulose +  and muricate +
Vergerette du Kamtchatka +
white +  and pink or purplish +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Labr.) +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Idaho +, Maine +, Mich. +, Minn. +, Mont. +, S.Dak. +, Utah +, Wash. +, Wyo. +  and e Asia (Russian Far East) +
900–3100 m +
strigose +, villoso-hirsute +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky and sandy sites, riverbanks, roadsides, and other disturbed sites +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
turbinate;hemispheric +
0.8 cm8 mm <br />0.008 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
serrate-dentate +  and entire +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering Jun–Aug(–Sep). +
3-nerved +  and 1-nerved +
hirsute +  and glabrous +
narrowly elliptic +  and linear-lanceolate +
Bull. Soc. Imp. Naturalistes Moscou +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
branched +  and simple +
branched +  and simple +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Erigeron acris subsp. kamtschaticus +, Erigeron yellowstonensis +  and Trimorpha acris var. kamtschatica +
Erigeron acris var. kamtschaticus +
Erigeron acris +
variety +
inflated +  and tubular +
fibrous-rooted +  and taprooted +
60 cm600 mm <br />0.6 m <br /> (80 cm800 mm <br />0.8 m <br />) +
perennial +, short-lived +, biennial +  and annual +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
tree +, shrub +  and subshrub +