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FNA | Family List | FNA Vol. 9 | Rosaceae | Petrophytum

3b. Petrophytum caespitosum (Nuttall) Rydberg subsp. acuminatum (Rydberg) Munz, Aliso. 4: 92. 1958.

Petrophytum acuminatum Rydberg in N. L. Britton et al., N. Amer. Fl. 22: 253. 1908

Short shoots compressed into tight rosettes. Leaf blades 1–1.8 cm, abaxial surface sparsely strigose. Inflorescences compressed panicles, usually appearing racemose, with scattered bracts along peduncle, branches uncommon, 0.5–1 cm. Flowers: petal apex acute to acuminate.

Flowering Jun–Sep. Limestone cliffs; of conservation concern; 1200–2500 m; Calif.

Subspecies acuminatum is known only from the southern Sierra Nevada in Fresno and Tulare counties.


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