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POLEMONIACEAE

PHLOX FAMILY

Robert W. Patterson, Family Editor

Annual, perennial herb, shrub, vine
Leaves simple or compound, cauline (or most in basal rosette), alternate or opposite; stipules 0
Inflorescence: cymes, heads, or flowers solitary
Flower: calyx generally 5-ribbed, ribs often connected by translucent membranes that are generally torn by growing fruit; corolla generally 5-lobed, radial or bilateral, salverform to bell-shaped, throat often well defined; stamens generally 5, epipetalous, attached at same or different levels, filaments of same or different lengths, pollen white, yellow, blue, or red; ovary superior, chambers generally 3, style 1, stigmas generally 3
Fruit: capsule
Seeds 1–many, gelatinous or not when wet
Genera in family: 19 genera, 320 species: Am, n Eur, n Asia; some cultivated (Cantua, Cobaea (cup-and-saucer vine), Collomia, Gilia, Ipomopsis, Linanthus, Phlox )
Recent taxonomic note: *See also revised taxonomy of Porter and Johnson 2000 Aliso 19(1):55–91; Porter 1998 Aliso 17:83–85
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ERIASTRUM

Robert W. Patterson

Annual, perennial herb, glabrous to woolly
Stem generally erect
Leaves cauline, alternate, pinnately lobed or simple; lobes generally linear or lanceolate
Inflorescence: heads, bracted, generally densely woolly; bracts leaf-like; flowers sessile
Flower: calyx lobes unequal; corolla radial or bilateral, funnel-shaped to salverform; stamens equal or not, attached at same level, anthers generally sagittate, pollen white or blue; style included or exserted
Seeds 1–few per chamber
Species in genus: 13 species: w North America
Etymology: (Greek, woolly star)
Reference: [Harrison 1972 Brigham Young Univ Sci Bull, Biol Ser 16:1–26]

Native

E. luteum (Benth.) H. Mason

YELLOW-FLOWERED ERIASTRUM

Annual
Stem 2–25 cm
Leaf 20–40 mm, thread-like, woolly, entire or 2-lobed at base
Flower: corolla salverform or slightly bilateral, bright yellow, tube 3 mm, lobes 5–6 mm; stamens attached in lower throat, equal, exserted
Ecology: UNCOMMON. Drying slopes
Elevation: < 1000 m.
Bioregional distribution: South Coast Ranges (Monterey, San Luis Obispo cos.).

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