sentences:  In February 1874 Greene assumed pastorship of a church in Vallejo, California, the beginning of many short stays with churches throughout the Southwest.During these travels, Greene continued collecting plants, making forays into Arizona, New Mexico, and Mexico.In 1876–1877, while Greene was an episcopal priest in Yreka, California, he discovered the first specimens of "Phlox hirsuta", a small flowering plant found only in that area.