Scientific Name: Lithospermum cobrense
Common Names: Smooththroat Stoneseed, Mountain Gromwell, Puccoon
Growth Habit: Herb/Forb
Arizona Native Status: Native
Habitat: Upland, Mountain
Flower Color: Yellow
Flowering Season: Summer. This wildflower blooms after the summer monsoon rain have begun.
Height: To 1 foot (30 cm) tall
Description: The flowers are clustered on the tops of erect floral coils. The individual flowers are 3/4 inch (1.9 cm) wide and tubular with a short corolla tube and 5 rounded lobes. The leaves are narrowly linear, grayish green, hairy, and have rolled under edges. The stems are hairy and upright.
The similar Narrowleaf Stoneseed (Lithospermum incisum) has flowers with longer floral tubes and highly ruffle-edged lobes, while Manyflowered Stoneseed (L. multiflorum) has flowers with longer floral tubes, smaller lobes, and a wider mouth and Green Stoneseed (L. viride) has greenish yellow flowers and lanceolate leaves.
Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Family: Boraginaceae – Borage family
Genus: Lithospermum L. – stoneseed
Species: Lithospermum cobrense Greene – smooththroat stoneseed
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