Sedum stenopetalum

Herbs, annual, biennial, or weakly perennial, tufted or not, glabrous. Stems decumbent, branched, bearing terminal rosettes. Leaves alternate, spreading to erect, sessile; blade green, not glaucous, linear to elliptic-oblong (subulate when dry), subterete, 4.3–13.8 × 1.4–2.7 mm, base (persistent), spurred (spur simple, small), scarious, apex acute, (surfaces sometimes papillose marginally). Flowering shoots erect, branched, 10–43 cm; leaf blades linear, base with scarious spurs; offsets rosettes, produced from axils of leaves and bracts. Inflorescences solitary flowers or cymes, 9–15(–25)-flowered, mostly 3-branched; branches slightly recurved, not forked; bracts linear-lanceolate, smaller than leaves, base spurred. Pedicels absent or to 0.5 mm. Flowers 5-merous; sepals erect, distinct, pale green or yellow-green, lanceolate or ovate, equal, 2–3.7 × 0.9–1.7 mm, apex acute or long-acuminate; petals stellately spreading, distinct, deep yellow with green to brown dorsal keel to almost white, lanceolate or elliptic, slightly carinate, 5.4–8 mm, apex obtuse, acute, or long-acuminate, sometimes with aristate appendage; filaments yellow; anthers yellow; nectar scales greenish yellow or yellowish white, reniform-subquadrate or square. Carpels divergent in fruit, shortly connate, pale green, yellow-green, or brown. 2n = 50–54, 58, 62–70, 63–64.

Distribution

• Generated Map
• Legacy Map

w North America.

Discussion

Varieties 2 (2 in the flora).

Mature follicles of Sedum stenopetalum are finely papillose, with prominent lips along the adaxial suture. Petal number can range from three to eight.

Selected References

None.

Lower Taxa

Sedum stenopetalum var. monanthum, Sedum stenopetalum var. stenopetalum

Key

1	Leaf blades linear; inflorescences 9-25-flowered cymes.	Sedum stenopetalum var. stenopetalum
1	Leaf blades elliptic-oblong; inflorescences solitary flowers.	Sedum stenopetalum var. monanthum