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Gutierrezia sarothrae

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Name

Identification
Gutierrezia sarothrae (Pursh) Britton & Rusby [family ASTERACEAE ] (stored under name);
Related name
  • Leysera parviflora
  • Gutierrezia myriacephala
  • Gutierrezia globosa
  • Gutierrezia scoparia
  • Gutierrezia microcephala
  • Brachyris divaricata
  • Erigeron punctatum
  • Gutierrezia sarothrae
  • Gutierrezia linoides
  • Gymnosperma corymbosum
  • Gutierrezia corymbosa
  • Gutierrezia tenuis
  • Erigeron carolinianum
  • Gutierrezia myriocephala
  • Brachyris euthamia
  • Gutierrezia euthamia
  • Brachyris euthamiae
  • Gutierrezia argyrocarpa
  • Gutierrezia greenei
  • Gutierrezia longifolia
  • Gutierrezia juncea
  • Gutierrezia linearis
  • Gutierrezia perseverans
Common name
  • Small-head snakeweed, Flora of North America Vol. 20
  • Kindlingweed, Flora of North America Vol. 20

Flora

Entry for Gutierrezia microcephala (de Candolle) A. Gray [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 20,
Names
Gutierrezia microcephala (de Candolle) A. Gray [family COMPOSITAE], Mem. Amer. Acad. Arts, n. s., 4: 74. 1849
Brachyris microcephala de Candolle [family ], in A. P. de Candolle and A. L. P. P. de Candolle, Prodr., 5: 313. 1836
Gutierrezia sarothrae (Pursh) Britton & Rusby var. microcephala (de Candolle) L. D. Benson [family COMPOSITAE]
Xanthocephalum microcephalum (de Candolle) Shinners [family COMPOSITAE]
Treatment Author(s)
Guy L. Nesom
Information
Subshrubs, 20–140 cm. Stems glabrous or minutely hispidulous. Leaves: basal and proximal absent at flowering; cauline blades 1-nerved, linear or filiform to narrowly oblanceolate or lanceolate, 0.5–2.2(–4) mm wide, little reduced distally. Heads (2–6, sessile to subsessile, in compact glomerules) in flat-topped arrays. Involucres cylindric, 1–1.5 mm diam. Phyllary apices flat. Ray florets 1(–2; each enclosed by conduplicate inner phyllary); corollas yellow, (1.5–)2–3.5 mm. Disc florets 1, sometimes 2 (functionally staminate; corollas broadly obdeltate-funnelform, throats widely flaring, lobes 1/3 corolla lengths, recurved-coiling). Cypselae 1–1.8(–2.5) mm, faces densely strigoso-sericeous; pappi (rays, readily falling) of 1 series of narrowly lanceolate-oblong scales). 2n = 8, 16, 24, 32.
Phenology
dec, feb (winter), jun-aug (summer), sep-nov (fall)
Altitude range
800–2500 m;
Distribution
Mexico (Baja California).Mexico (Chihuahua).Mexico (Coahuila).Mexico (Durango).Mexico (Nuevo León).Mexico (San Luis Potosí).Mexico (Sonora).Mexico (Tamaulipas).Mexico (Veracruz).Mexico (Zacatecas).USA Ariz.USA Calif.USA Colo.USA Nev.USA N.Mex.USA Tex.USA Utah
Discussion
Gutierrezia microcephala is recognized by its perennial habit and its small, tightly clustered heads, each with 4–8 phyllaries and 1(–2) ray and disc florets. Each ray floret is enclosed by a conduplicate inner phyllary. Forms of G. sarothrae with few florets in each head can be distinguished by their bisexual and fertile disc florets and tubular-funnelform disc corollas.

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