Penstemon strictus (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Penstemon strictus" in English language version.

refsWebsite

Global rank English rank

6^th place

438^th place

336^th place

low place

1^st place

low place

archive.org

Arthur Cronquist; Arthur H. Holmgren; Noel H. Holmgren; James L. Reveal; Patricia K. Holmgren (1984). Intermountain Flora; Vascular Plants of the Intermountain West, U.S.A., vol. 4. Subclass Asteridae (except Asteraceae). The New York Botanical Garden. pp. 443–444. ISBN 0-231-04120-9.
Theodore F. Niehaus; Charles L. Ripper & Virginia Savage (1984). A Field Guide to Southwestern and Texas Wildflowers. Houghton Mifflin Company. pp. 350–351. ISBN 0-395-36640-2.

USDA, NRCS. 2007. The PLANTS Database, 11 June 2007). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

"Wildflower Botanical Names - Alphabetic Listing". Wildflower Information.org. Retrieved 2007-06-11. Also various catalogs.