The comparative biology of the two closely-related species Penstemon tenuiflorus Pennell and P. hirsutus (L.) Willd. (Scrophulariaceae, section Graciles): III. Ecological life cycle, growth characteristics, and flowering requirements
- Richard K. Clements
- , Jerry M. Baskin
- , Carol C. Baskin
Producción científica: Article › revisión exhaustiva
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(Scopus)