Heil, K.D.; O’Kane, S.L. 2003. Catalog of the Four Corners flora vascular plants of the San Juan River Drainage, Arizona, Colorado, New Mexico, and Utah. Harvard Papers in Botany. 7(2): 321-379.

Heil, K.D.; O’Kane, S.L. 2003. Catalog of the Four Corners flora vascular plants of the San Juan River Drainage, Arizona, Colorado, New Mexico, and Utah. Harvard Papers in Botany. 7(2): 321-379.

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