Solidago rigida |
|||||||||
---|---|---|---|---|---|---|---|---|---|
stiff-leaf goldenrod |
|||||||||
Habit | Plants 30–150 cm; caudices branching, woody. | ||||||||
Stems | 1–10+, erect, stout, hairy. |
||||||||
Leaves | basal and proximal cauline usually present at flowering, abruptly narrowed to long petioles, blades ovate to rhombic, 80–200 × 24–50 mm, firm, flat, margins entire to crenate, sometimes undulate, apices obtuse to acute, faces densely hairy; mid to distal cauline sessile, blades ovate, 30–50 × 15–17 mm, stiff, greatly reduced distally, margins entire or finely serrate, sometimes undulate, apices acute to obtuse. |
||||||||
Peduncles | 3–15 mm, strigillose-canescent, bracteoles 1–3, linear-lanceolate. |
||||||||
Involucres | campanulate, 6–8 mm. |
||||||||
Ray florets | 6–13; laminae 1.4–5.4 × 1.2–1.9 mm. |
||||||||
Disc florets | 14–35; corollas 4.3–6.1 mm, lobes 0.6–1.1 mm. |
||||||||
Phyllaries | in 3–4 series, unequal, oblong, conspicuously striate (3–5 pronounced nerves), obtuse. |
||||||||
Heads | 9–190, in corymbiform arrays, compact or branches long and spreading, densely hairy throughout. |
||||||||
Cypselae | (obconic) 0.8–1.7 mm (ribbed), glabrous or strigillose apically; pappi 3–4 mm. |
||||||||
Solidago rigida |
|||||||||
Distribution |
AL; AR; CO; CT; DE; GA; IA; IL; IN; KS; KY; LA; MA; MD; MI; MO; MS; MT; NC; ND; NE; NJ; NM; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; WI; WV; WY; AB; MB; ON; SK
|
||||||||
Discussion | Subspecies 3 (3 in the flora). Solidago rigida is divided into three subspecies with distinct morphologies and partially overlapping ranges. Intermediates occur between the subspecies in areas of sympatry. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||
Key |
|
||||||||
Source | FNA vol. 20, p. 163. | ||||||||
Parent taxa | Asteraceae > tribe Astereae > Solidago > sect. Ptarmicoidei | ||||||||
Sibling taxa | |||||||||
Subordinate taxa | |||||||||
Synonyms | Aster rigidus, Oligoneuron rigidum | ||||||||
Name authority | Linnaeus: Sp. Pl. 2: 880. (1753) | ||||||||
Web links |