Flora of North America species comparison

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Townsendia hookeri

Hooker's Townsend daisy, Hooker's townsendia
Habit Perennials, 1–3 cm (± pulvinate).
Stems

± erect;

internodes 0.1–1 mm, ± strigose.
Leaves

basal and cauline, blades narrowly oblanceolate to linear, 5–25(–40+) × 1–1.5(–3) mm, fleshy, faces ± strigoso-sericeous, little, if at all.
Involucres

± campanulate, 8–18+ mm diam.
Ray florets

15–35;

corollas white adaxially, laminae 8–12+ mm, glabrous abaxially.
Disc florets

120–180+;

corollas 4–5(–6+) mm.
Phyllaries

50–65+ in 5+ series, the longer ± lance-linear, 7–11(–13) mm (l/w = 6–9), apices attenuate, abaxial faces sparsely strigose or glabrate.
Heads

± sessile.
Cypselae

3.5–4.5 mm, faces hairy, hair tips glochidiform;

pappi persistent;

on ray cypselae ca. 30 subulate to setiform scales (1–)5–7 mm;

on disc cypselae ca. 30 subulate to setiform scales 5.5–7.5+ mm.
2n

= 18.

Townsendia hookeri
Phenology Flowering Mar–Jun.
Habitat Gravelly benches, sandy slopes
Elevation 700–1800 m (2300–5900 ft)
Distribution
from FNA
AK; CO; ID; MT; ND; NE; SD; UT; WY; AB; BC; SK; YT
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 200.
Parent taxa Asteraceae > tribe Astereae > Townsendia
Sibling taxa
T. annua, T. aprica, T. condensata, T. eximia, T. exscapa, T. fendleri, T. florifera, T. formosa, T. glabella, T. grandiflora, T. gypsophila, T. incana, T. jonesii, T. leptotes, T. mensana, T. microcephala, T. minima, T. montana, T. parryi, T. rothrockii, T. scapigera, T. smithii, T. spathulata, T. strigosa, T. texensis
Synonyms T. nuttallii
Name authority Beaman: Contr. Gray Herb. 183: 95, plates 17, 20, figs. 5, 6. (1957)
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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