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Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

LOGFIA

James D. Morefield


Annual 1–50[70] cm, ± gray, cobwebby to tomentose. Stem: 1, erect, or 2–10+, generally ascending to prostrate, ± forked at least distally, generally evenly leafy proximally, ± leafless between distal forks. Leaf: alternate, ± sessile, linear to obovate or awl-shaped, entire; distal leaves subtending heads, crowded, largest > proximal leaves. Inflorescence: heads disciform, ± sessile, generally 2–10(14) per group or some [all] single; involucre 0 or vestigial, simulated by paleae, or ± cup-like, then phyllaries various, << paleae; receptacle length [0.4]0.7–1.6 × width, obovoid to mushroom-shaped, glabrous; paleae, except innermost, each ± enclosing pappus-lacking pistillate flower, deciduous with fruit (sometimes tardily), ± boat-shaped, obtuse to acute, ± tomentose abaxially, obscurely parallel-veined, veins 5+, margin reflexed distally as scarious wing, wing prominent, terminal, erect to curved inward, visible in head; innermost paleae ± 5[8], collectively surrounding pappus-bearing disk + inner pistillate flowers, > outer, spreading at maturity, concave, lance-ovate, acute, cartilaginous, ± brown, ± glabrous. Pistillate flower: (11)14–45+, generally only outer subtended by paleae; corolla obscure, narrowly cylindric. Disk flower: bisexual, 2–10; pappus present; corolla 4–5-lobed; anther base tailed, tip ± triangular; style tips ± linear-oblong. Fruit: obovoid to oblong; outer pistillate-flower fruit > inner, ± enclosed by palea, generally compressed laterally, smooth, shiny, corolla scar ± terminal, pappus 0; inner pistillate-flower fruit and disk fruit free of paleae, ± cylindric, generally ± papillate, dull, corolla scar terminal, pappus of (11)13–28+ deciduous bristles, visible in head, generally falling together in intact or broken ring.
12 species: southwestern North America, Europe, southwestern Asia, northern Africa, some alien ± worldwide. (Anagram of Filago) [Morefield 2006 FNANM 19:443–447] Characters may be unreliable in young or dwarf plants. Formerly included in Filago in North America.
Unabridged note: 2 Europe aliens, Logfia arvensis(L.) Holub, Logfia minima (Sm.) Dumort. occur near California.

Key to Logfia

1. Leaf generally awl-shaped, stiff; phyllaries generally 5, equal, unlike paleae; outer paleae bent inward 70–90°, longest 3.3–4.1 mm, body hard ..... L. gallica

1' Leaf generally elliptic to obovate or ± linear, flexible; phyllaries 0 or 1–4, unequal, like vestigial paleae; outer paleae curved inward 20–60°, longest 2.1–3.3 mm, body membranous to cartilaginous

2. Stem generally leafless between proximal forks, becoming ± purple to black, ± glabrous; heads 4–10 per group, only at stem forks and tips; distal leaves ± linear, generally 2–5 × heads; pappus-bearing inner flowers 4–12, (0)1–2 pistillate ..... L. arizonica

2' Stem ± evenly leafy proximally, green to ± gray or ± white, cobwebby to tomentose; heads (1)2–5 per group, not only at stem forks and tips; distal leaves elliptic to obovate, 0.8–2(3) × heads; pappus-bearing inner flowers (12)17–40+, (4)10–35 pistillate

3. Stem (1)3–10+, forked ± throughout; largest leaves 6–8(10) mm, 1–2 mm wide; distal leaves obtuse; outer palea body, except midvein, membranous; disk corolla lobes generally 5, ± yellow to ± brown; outer fruit 0.7–0.9 mm; inner fruit generally smooth, pappus bristles (11)13–15, falling separately or in 2s ..... L. depressa

3' Stem 1(7), generally forked distally, central axis dominant; largest leaves 10–15(20) mm, 2–3(4) mm wide; distal leaves generally acute; outer palea body ± cartilaginous; disk corolla lobes generally 4, ± bright red to purple; outer fruit 0.9–1 mm; inner fruit ± papillate, pappus bristles 17–23+, falling together in intact or broken ring ..... L. filaginoides

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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