13.
Solidago bicolor
Linnaeus, Syst. Nat. ed. 12. 2: 556. 1767; Mant. 1: 114. 1767.
White goldenrod , silverrod , verge d'or bicolore
Aster bicolor
(Linnaeus) Nees;
A. pubens
(M. A. Curtis ex Torrey & A. Gray) Kuntze;
Solidago alba
Miller
; S. curtisii
Torrey & A. Gray var.
pubens
(M. A. Curtis ex Torrey & A. Gray) A. Gray;
S. pubens
M. A. Curtis ex Torrey & A. Gray
Plants
20—100 cm; caudices branching.
Stems
1(—5), erect, usually branching only in array, moderately to densely hispido-villous.
Leaves:
basal and proximal cauline tapering to winged petioles, blades oblanceolate to ovate, 35—210 × 15—50 mm, margins serrate or crenate, apices acute, sparsely to moderately soft hispido-villous, more densely so on abaxial nerves; rosettes on rhizome branches sometimes present at flowering; mid and distal cauline sessile, blades elliptic, 15—50 × 5—15 mm, distally reduced, margins entire.
Heads
12—270 (1—15 per branch) in usually wand-shaped paniculiform arrays , of short axillary and terminal racemiform, non-secund clusters, sometimes proximal branches elongated, ascending and bearing short axillary and terminal racemiform clusters.
Peduncles
1.5—2.5 mm, hispido-villous to canescent.
Involucres
campanulate, 3—5 mm.
Phyllaries
in 3—4 series, appressed, strongly unequal, oblong, margins white, scarious, apices obtuse to rounded.
Ray florets
7—9 (white); laminae 3.5—4 × 1—1.5 mm.
Disc florets
9—12; corollas 3—4 mm, lobes 0.6—1.2 mm.
Cypselae
(narrowly obconic) 1.5—2.5 mm, smooth or with 5—8 narrow, darker, sunken striations, glabrous or sparsely strigose;
pappi
2.5—3.5 mm (sometimes strongly clavate).
2
n
=18.
Flowering Aug—Oct. Sandy and clay soils, dry open woods, rocky slopes, disturbed soils; 0—1000+ m; N.B., N.S., Ont., P.E.I., Que.; Ala., Ark., Conn., Del., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.
