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Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Annual 1--50 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, 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.
Species In Genus: 12 species: southwestern North America, Europe, southwestern Asia, northern Africa, some alien +- worldwide. Etymology: (Anagram of Filago) Note: Characters may be unreliable in young or dwarf pls. Formerly included in Filago in North America.
Unabridged Note: 2 Europe aliens, Logfia arvensis_(L.) Holub, Logfia minima (Sm.) Dumort. occur near California.
eFlora Treatment Author: James D. Morefield
Jepson Online Interchange
Key to LogfiaPrevious taxon: Leucosyris carnosa
Next taxon: Logfia arizonica
Citation for this treatment: James D. Morefield 2017. Logfia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=77541, accessed on January 18, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 18, 2017.