Flora of North America species comparison

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Erigeron philadelphicus

Erigeron ochroleucus

Philadelphia daisy, Philadelphia fleabane, vergerette de philadelphie

buff daisy, buff fleabane
Habit Annuals, biennials, or short-lived perennials, 4–80 cm; fibrous-rooted, caudices simple. Perennials, (2–)8–18(–20, 30) cm; taprooted, caudices usually simple, rarely branched, relatively thick, woody.
Stems

erect (green proximally, leafy to arrays), hirsuto-villous to villous proximally, loosely strigose to sparsely hirsute distally, minutely glandular.

ascending (greenish), loosely strigose to puberulent-strigose, sometimes sparsely minutely glandular.
Leaves

basal (persistent or withering by flowering) and cauline;

basal blades oblanceolate to obovate, (15–)30–110(–150) × 10–25(–40) mm, margins shallowly crenate to coarsely serrate or pinnately lobed, faces sparsely hirsute to villous, eglandular;

cauline blades oblong-oblanceolate to lanceolate, gradually reduced distally (bases clasping to auriculate-clasping).

basal (persistent) and cauline (leaf bases broadened or not, not thickened and whitish-indurate);

basal blades linear to linear-oblanceolate, (20–)40–90(–120) × 1–4(–5) mm;

cauline reduced distally or often little reduced on at least proximal 1/2 of stems, (bases gradually tapering) margins entire (apices acute), abaxial faces glabrous at least on distal 1/4–1/2, strigose proximally, adaxial loosely strigose, eglandular.
Involucres

4–6 × 6–15 mm.

5.5–7 × 10–15(–18) mm.
Ray florets

150–250(–400);

corollas usually white, sometimes pinkish, 5–10 mm, laminae not coiling or tardily coiling.

30–62;

corollas white to pinkish, bluish, or lavender, (7–)8–12 mm, laminae coiling.
Disc corollas

2.1–3.2 mm.

2.8–3.6 mm.
Phyllaries

in 2–3 series (sometimes basally connate), hirsuto-villous to sparsely hirsute or glabrous, sometimes minutely glandular.

in 3–4 series, densely and loosely hirsuto-villous (hairs whitish, without colored cross walls), minutely glandular.
Heads

(1–)3–35 usually in corymbiform arrays (ultimate branches arising near stem tips).

1(–3).
Cypselae

0.6–1.1 mm, 2-nerved, faces sparsely strigose;

pappi: outer of setae, inner of 15–20(–30) bristles.

2–2.6 mm, 2-nerved, faces sparsely villosulous (often hairs spreading);

pappi: outer of setae or scales, inner of 12–15 bristles.

Erigeron philadelphicus

Erigeron ochroleucus
Phenology Flowering Jun–Aug.
Habitat Rocky or sandy slopes, limestone outcrops, ridges, and talus, meadows, sagebrush-grassland, juniper-mountain mahogany, ponderosa pine, limber pine, limber pine–Douglas fir, alpine tundra
Elevation 1100–3000(–3300) m (3600–9800(–10800) ft)
Distribution
from FNA
AL; AR; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT [Introduced worldwide in temperate areas as a weed]
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; MT; NE; SD; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Plants recognized as var. scribneri are smaller but otherwise essentially similar to typical plants, except for a tendency to produce bluish rays. They occur mostly at higher elevations than more typical plants. P. Lesica (2005) maintained var. scribneri and mapped the two varietites as essentially congruent in geographic range.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Cauline leaf faces sparsely hirsute to villous
var. philadelphicus
1. Cauline leaf faces glabrous or glabrate
→ 2
2. Leaves of basal rosettes withering by flowering; salt marshes, British Columbia
var. glaber
2. Leaves of basal rosettes persistent through flowering; crevices in shale or dolomite, usually beside rivers or lakes, Ontario, Quebec, New York, and Vermont
var. provancheri
Source FNA vol. 20, p. 319. FNA vol. 20, p. 294.
Parent taxa Asteraceae > tribe Astereae > Erigeron Asteraceae > tribe Astereae > Erigeron
Sibling taxa
E. abajoensis, E. acomanus, E. acris, E. aequifolius, E. algidus, E. aliceae, E. allocotus, E. alpiniformis, E. anchana, E. annuus, E. aphanactis, E. arenarioides, E. argentatus, E. arisolius, E. arizonicus, E. asperugineus, E. aureus, E. barbellulatus, E. basalticus, E. bellidiastrum, E. bigelovii, E. biolettii, E. blochmaniae, E. bloomeri, E. breweri, E. caespitosus, E. calvus, E. canaani, E. canus, E. cascadensis, E. cavernensis, E. cervinus, E. chrysopsidis, E. clokeyi, E. compactus, E. compositus, E. concinnus, E. consimilis, E. corymbosus, E. coulteri, E. cronquistii, E. davisii, E. decumbens, E. denalii, E. disparipilus, E. divergens, E. eatonii, E. elatior, E. elatus, E. elegantulus, E. elmeri, E. engelmannii, E. evermannii, E. eximius, E. filifolius, E. flabellifolius, E. flagellaris, E. flettii, E. foliosus, E. formosissimus, E. garrettii, E. geiseri, E. glabellus, E. glacialis, E. glaucus, E. goodrichii, E. gracilis, E. grandiflorus, E. greenei, E. heliographis, E. hessii, E. howellii, E. humilis, E. hyperboreus, E. hyssopifolius, E. inornatus, E. jonesii, E. kachinensis, E. karvinskianus, E. klamathensis, E. kuschei, E. lackschewitzii, E. lanatus, E. lassenianus, E. latus, E. leibergii, E. leiomerus, E. lemmonii, E. linearis, E. lobatus, E. lonchophyllus, E. maguirei, E. mancus, E. maniopotamicus, E. mariposanus, E. melanocephalus, E. miser, E. modestus, E. muirii, E. multiceps, E. nanus, E. nauseosus, E. nematophyllus, E. neomexicanus, E. nivalis, E. ochroleucus, E. oreganus, E. oreophilus, E. ovinus, E. oxyphyllus, E. pallens, E. parishii, E. parryi, E. peregrinus, E. petrophilus, E. pinnatisectus, E. piperianus, E. piscaticus, E. poliospermus, E. porsildii, E. pringlei, E. procumbens, E. pulchellus, E. pulcherrimus, E. pumilus, E. purpuratus, E. pygmaeus, E. quercifolius, E. radicatus, E. reductus, E. religiosus, E. rhizomatus, E. robustior, E. rybius, E. rydbergii, E. salishii, E. salmonensis, E. sanctarum, E. saxatilis, E. sceptrifer, E. scopulinus, E. serpentinus, E. sionis, E. sivinskii, E. sparsifolius, E. speciosus, E. strigosus, E. subglaber, E. subtrinervis, E. supplex, E. tenellus, E. tener, E. tenuis, E. tracyi, E. trifidus, E. tweedyi, E. uintahensis, E. uncialis, E. uniflorus, E. untermannii, E. ursinus, E. utahensis, E. vagus, E. velutipes, E. vernus, E. versicolor, E. vetensis, E. vicinus, E. vreelandii, E. watsonii, E. wilkenii, E. yukonensis
E. abajoensis, E. acomanus, E. acris, E. aequifolius, E. algidus, E. aliceae, E. allocotus, E. alpiniformis, E. anchana, E. annuus, E. aphanactis, E. arenarioides, E. argentatus, E. arisolius, E. arizonicus, E. asperugineus, E. aureus, E. barbellulatus, E. basalticus, E. bellidiastrum, E. bigelovii, E. biolettii, E. blochmaniae, E. bloomeri, E. breweri, E. caespitosus, E. calvus, E. canaani, E. canus, E. cascadensis, E. cavernensis, E. cervinus, E. chrysopsidis, E. clokeyi, E. compactus, E. compositus, E. concinnus, E. consimilis, E. corymbosus, E. coulteri, E. cronquistii, E. davisii, E. decumbens, E. denalii, E. disparipilus, E. divergens, E. eatonii, E. elatior, E. elatus, E. elegantulus, E. elmeri, E. engelmannii, E. evermannii, E. eximius, E. filifolius, E. flabellifolius, E. flagellaris, E. flettii, E. foliosus, E. formosissimus, E. garrettii, E. geiseri, E. glabellus, E. glacialis, E. glaucus, E. goodrichii, E. gracilis, E. grandiflorus, E. greenei, E. heliographis, E. hessii, E. howellii, E. humilis, E. hyperboreus, E. hyssopifolius, E. inornatus, E. jonesii, E. kachinensis, E. karvinskianus, E. klamathensis, E. kuschei, E. lackschewitzii, E. lanatus, E. lassenianus, E. latus, E. leibergii, E. leiomerus, E. lemmonii, E. linearis, E. lobatus, E. lonchophyllus, E. maguirei, E. mancus, E. maniopotamicus, E. mariposanus, E. melanocephalus, E. miser, E. modestus, E. muirii, E. multiceps, E. nanus, E. nauseosus, E. nematophyllus, E. neomexicanus, E. nivalis, E. oreganus, E. oreophilus, E. ovinus, E. oxyphyllus, E. pallens, E. parishii, E. parryi, E. peregrinus, E. petrophilus, E. philadelphicus, E. pinnatisectus, E. piperianus, E. piscaticus, E. poliospermus, E. porsildii, E. pringlei, E. procumbens, E. pulchellus, E. pulcherrimus, E. pumilus, E. purpuratus, E. pygmaeus, E. quercifolius, E. radicatus, E. reductus, E. religiosus, E. rhizomatus, E. robustior, E. rybius, E. rydbergii, E. salishii, E. salmonensis, E. sanctarum, E. saxatilis, E. sceptrifer, E. scopulinus, E. serpentinus, E. sionis, E. sivinskii, E. sparsifolius, E. speciosus, E. strigosus, E. subglaber, E. subtrinervis, E. supplex, E. tenellus, E. tener, E. tenuis, E. tracyi, E. trifidus, E. tweedyi, E. uintahensis, E. uncialis, E. uniflorus, E. untermannii, E. ursinus, E. utahensis, E. vagus, E. velutipes, E. vernus, E. versicolor, E. vetensis, E. vicinus, E. vreelandii, E. watsonii, E. wilkenii, E. yukonensis
Subordinate taxa
E. philadelphicus var. glaber, E. philadelphicus var. philadelphicus, E. philadelphicus var. provancheri
Synonyms E. laetevirens, E. montanus, E. ochroleucus var. scribneri, E. scribneri, E. tweedyanus
Name authority Linnaeus: Sp. Pl. 2: 863. (1753) Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 311. (1840)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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