Sedum nuttallianum Raf.

Nuttall's Sedum, Yellow Stonecrop


CC = 10
CW = 5
MOC = 4

© SRTurner

Family - Crassulaceae

Habit - Fibrous-rooted annual forb, the main stems erect or ascending, the foliage and flowers lacking noticeable resinous lines or dots visible upon drying.

Sedum_nuttallianum_habit.jpg Habit.

© SRTurner

Sedum_nuttallianum_roots.jpg Roots.

© SRTurner

Stems - Erect, to 12 cm, green, occasionally becoming reddish-or pinkish-tinged at maturity, not glaucous.

Sedum_nuttallianum_stems.jpg Stem and leaves.

© SRTurner

Leaves - Alternate and basal, sessile, simple, sometimes appearing densely spiraled along the stem, usually withered by fruiting time. Blades 4-6 mm long, attached just above the minutely pouched base, linear to narrowly oblong-lanceolate, more or less circular in cross-section, the margins entire, the surfaces light to dark green or bluish green, rarely reddish-tinged at maturity, not or only slightly glaucous, rounded to bluntly pointed at the tip. Leaves only slightly and gradually reduced in size toward the stem tip.

Sedum_nuttallianum_leaves1.jpg Leaves.

© SRTurner

Inflorescences - Panicles with 2-4 branches, these spreading to loosely ascending spikes or spikelike racemes, the flowers oriented along the upper side of each branch, with leaflike bracts on the underside.

Sedum_nuttallianum_inflorescence1.jpg Inflorescence.

© SRTurner

Sedum_nuttallianum_inflorescence2.jpg Inflorescence.

© SRTurner

Flowers - Sepals usually 5, 1.5-3.0 mm long, narrowly lanceolate to oblong lanceolate, sharply pointed at the tip. Petals usually 5, 2.5-3.5 mm long, oblong-elliptic to oblong-lanceolate, yellow. Stamens with the anthers yellow. Nectaries about as long as wide, oblong to broadly obovate, yellow to milky white. Carpels 4 or 5, greenish yellow.

Sedum_nuttallianum_flowers.jpg Flowers.

© SRTurner

Sedum_nuttallianum_sepals.jpg Sepals.

© SRTurner

Sedum_nuttallianum_corollas.jpg Corollas.

© SRTurner

Fruits - Follicles 1.5-3.0 mm long, spreading at maturity. Seeds 0.5-0.9 mm long, obovoid, very faintly wrinkled or with a few faint, rounded ridges, yellowish brown.

Sedum_nuttallianum_fruits1.jpg Fruits.

© SRTurner

Sedum_nuttallianum_fruits2.jpg Fruits.

© SRTurner

Flowering - May - June.

Habitat - Chert and sandstone glades, rocky roadsides.

Origin - Native to the U.S.

Lookalikes - Sedum carmentosum.

Other info. - This native stonecrop is uncommon in Missouri, where it occurs in only a few counties in the southwestern corner of the state. Its main range extends through Texas and Oklahoma, but not much beyond that. The plant is identified by its yellow flowers and by leaves which are fleshy and alternate. The leaf arrangement serves to distinguish the species from S. sarmentosum.

A synonym is Sedum nuttallii.

Photographs taken at Blue River fishing and hunting reserve, Johnston County, OK, 5-25-2023 (SRTurner).