Erigeron foliosus

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 309. 1840.

Common names: Leafy fleabane
Treatment appears in FNA Volume 20. Treatment on page 311. Mentioned on page 270, 312.

Perennials, 20–100 cm; taprooted, woody, with caudexlike branches 2–15 cm, or leafy stems arising directly from roots; single plants usually bowl-shaped, with up to a 65 cm lateral spread. Stems erect or ascending (often purple, distal branches stiff, spreading-ascending, without axillary leaf tufts), glabrous or sparsely strigose (hairs straight, ascending-appressed), sometimes minutely glandular distally. Leaves cauline; blades 1-nerved (often sharply folding in narrower forms), filiform or linear to oblanceolate, 10–65 × 1–5 (–10) mm, relatively even-sized (mid and distal longer than internodes), margins entire, ciliate (cilia ascending-appressed, thick-based), faces glabrous or sparsely strigose, eglandular. Heads 1 or 2–5 in loosely corymbiform arrays. Involucres 3.2–6.5 × 7–12 (–14) mm. Phyllaries in 3–5 series (outer: margins stramineous, with distal, greenish, rhomboid patches; inner: margins narrow, scarious), glabrous or moderately to densely strigoso-hirsute, sparsely and obscurely to densely and prominently minutely glandular. Ray-florets 15–60; corollas white to blue, 5–15 mm, laminae not coiling or reflexing. Disc corollas 3.5–5.5 mm (throats slightly indurate, not inflated). Cypselae (1.8–) 2.2–3 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 19–34 bristles.

Discussion

Varieties 5 (5 in the flora).

Erigeron foliosus and its close relatives, including varieties, were mapped in detail by G. L. Nesom (1992b).

Selected References

None.

Key

1 Phyllaries 0.5–0.8 mm wide, margins usually thick or only narrowly scarious, abaxial faces sometimes sparsely and obscurely glandular > 2
1 Phyllaries 0.8–1 mm wide, margins usually broadly scarious, abaxial faces densely and prominently glandular > 3
2 Leaves (30–)40–60 mm, apices usually acute, often mostly with 1-directional orientation to one side of stems; inner phyllaries (4–)5–6 mm; ray corollas 8–13 mm Erigeron foliosus var. hartwegii
2 Leaves 20–40(–50) mm, apices usually rounded, without a prominent 1-directional orientation; inner phyllaries 3.2–4.5 mm; ray corollas 6–10 mm Erigeron foliosus var. foliosus
3 Phyllaries glabrous; leaves mostly 1–2 mm wide Erigeron foliosus var. confinis
3 Phyllaries moderately to densely strigoso-hirsute; leaves mostly 2–4 mm wide > 4
4 Leaf faces sparsely to moderately strigose; phyllaries with prominent, raised, orange-resinous midnerves; ray corollas 7–10 mm Erigeron foliosus var. franciscensis
4 Leaf faces glabrous or glabrate except for ascending-ciliate margins and midveins; phyllaries usually without distinct, orange-resinous midnerves; ray corollas 10–15 mm Erigeron foliosus var. mendocinus
... more about "Erigeron foliosus"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
Nuttall +
decurrent +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
linear;oblanceolate +
equal-sized +
1mm;5mm +
rugulose +  and muricate +
caudex-like +
Leafy fleabane +
not 2-lipped +  and actinomorphic +
white +  and blue +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
fertile +  and bisexual +
Calif. +  and nw Mexico +
strigose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
turbinate;hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
not coiling +
petiolate +  and sessile +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
3-nerved +  and 1-nerved +
glabrous or +  and moderately densely strigoso-hirsute +
narrowly elliptic +  and linear-lanceolate +
Trans. Amer. Philos. Soc., n. s. +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
prostrate +  and decumbent +
ascending +, erect +  and arising +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron foliosus +
Erigeron +
species +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +