Rock Rose is a perennial herb, with a simple, ascending downy stem, about a foot high. The leaves are alternate, from eight to twelve inches long, about one-fourth as wide; oblong, acute, lanceolate, erect, and entire. The flowers are large and bright yellow, some with petals, and some without petals. The flowers open in sunshine and cast their petals next day.
Helianthemum nummularium (Rock Rose)
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