47.
Solidago confinis
A. Gray, Proc. Amer. Acad. Arts. 17: 191. 1882.
Southern goldenrod
Solidago confinis
var.
luxurians
(H. M. Hall) Jepson
; S. spectabilis
A. Gray var.
confinis
(A. Gray) Cronquist
Plants
30—210 cm; caudices branching, thick, woody.
Stems
1—10+, ascending-erect, glabrous, often short fascicles of leaves present at nodes in axes of distal cauline leaves.
Leaves:
rosettes present at flowering; basal and proximal cauline tapering to elongate, winged petioles, bases nearly sheathing stems, blades linear-lanceolate, 50—260 (including petiole) × 5—45 mm, somewhat fleshy (fresh), margins entire, faces glabrous; mid and distal cauline crowded (robust plants), sessile, blades linear-lanceolate to lanceolate, 20—130 × 5—10(—25) mm, reduced distally, margins entire, apices acute to attenuate, glabrous.
Heads
70—320, usually not secund, in thyrsiform-paniculiform arrays, sometimes apically secund, 5—25(—50) × 2—14 cm; branches ascending to arching.
Peduncles
2—8 mm, glabrous or sparsely strigose; bracteoles 1—3, distally grading into phyllaries
. Involucres
campanulate, 2.5—4 mm.
Phyllaries
in 3—4 series, linear-triangular, unequal, margins involute near tip, sharply acute, the outer
1
/ 3 —
2
/ 3 length of inner (1—3 × 0.4—0.9 mm), midribs usually enlarged and translucent.
Ray florets
8—12; laminae 1—2.5 × 1 mm.
Disc florets
10—20; corollas 3—4 mm, lobes 1—1.5 mm.
Cypselae
(narrowly obconic) 2 mm (5—7 broad ribs lighter than body), sparsely to moderately strigose;
pappi
2—3 mm.
2
n
= 18.
Flowering Jul—Oct. Wet stream banks, springs, marshes; 0—2500 m; Calif.; Mexico (Baja California).
Solidago confinis
is similar to
S. spectabilis
and was treated by A. Cronquist (1994) as a variety of that species.
