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FNA | Family List | FNA Vol. 20 | Asteraceae | Solidago

163a.8. Solidago Linnaeus (sect. Solidago ) subsect. Junceae (Rydberg) G. L. Nesom, Phytologia. 75: 9. 1993.

Solidago [unranked] Junceae Rydberg, Fl. Plains N. Amer., 792. 1932; Solidago [unranked] Glaberrimae Rydberg; Solidago ser. Junceae (Rydberg) G. L. Nesom; Solidago ser. Spectabiles G. L. Nesom

Leaves: basal often present in rosettes at flowering, proximalmost cauline petiolate to attenuate-subpetiolate, sometimes present at flowering, largest; cauline sometimes 3-nerved (with two prominent lateral nerves), distal usually subtending fascicles of small linear leaves of lateral branches, two usually much larger than others. Heads in thyrsiform-paniculiform arrays, wand- to club-shaped or sometimes secund cone-shaped, proximal branches ascending to spreading. Phyllaries not striate, glabrous, eglandular. Pappus bristles usually in 2 series (inner weakly, if at all, clavate).

Species 7 (7 in the flora): North America, n Mexico.

1 Arrays club-shaped to subracemiform; leaves not 3-nerved, sometimes fleshy and waxy; caudices short-branched; usually boggy, marshy ground or stream margins   (2)
+ Arrays pyramidal to rhombic or obpyramidal, never racemiform; leaves waxy, not fleshy, sometimes 3-nerved; caudices short to long rhizomatous   (4)
2 (1) Phyllaries narrowly ovate to lanceolate, margins flat, obtuse to acuminate; rays usually 8–12; boggy or marshy grounds, alkaline meadows and hot springs, Nevada and adjacent states   46 Solidago spectabilis
+ Phyllaries narrowly linear-triangular, margins revolute distally, sharply acute; rays usually 5–10; wetter areas, along streams, c, s California into Mexico   (3)
3 (2) Leaf lengths usually less than 10 times widths; arrays usually paniculiform-thyrsiform; c, s California   47 Solidago confinis
+ Leaf lengths usually 10+ times longer widths; arrays narrowly paniculiform or racemiform; (along streams) vicinity of San Carlos and San Benito peaks, San Benitoand Fresno counties, California   48 Solidago guiradonis
4 (1) Stems from elongated creeping rhizomes; proximal and mid stem leaves often 3-nerved; prairies and prairielike habitats, mostly w of Mississippi River into Rocky Mountains   45 Solidago missouriensis
+ Stems from short thick rhizomes or caudices; proximal and mid stem leaves multinerved, rarely 3-nerved; fields, disturbed areas, glades in e Canada and United States   (5)
5 (4) Rays mostly 7–13; disc florets mostly 8–12; widely distributed, Nova Scotia to Manitoba, s to Alabama and Arkansas   42 Solidago juncea
+ Rays mostly 3–8; disc florets mostly 3–9   (6)
6 (5) Distal leaves ± spreading or reflexed, bearing axillary fascicles of reduced leaves; piedmont and Atlantic Coastal Plain; North Carolina, adjacent South Carolina, se Virginia   43 Solidago pinetorum
+ Distal leaves closely ascending or appressed, usually without axillary fascicles; cedar barrens, limestone ledges, and glades; Arkansas, Missouri, Tennessee   44 Solidago gattingeri

Lower Taxa


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