海量图书期刊资源,随时随地畅享阅读乐趣
Pectolinarigenin from Dugaldia pinetorum (Standl.) BiernerMark W. Bierner · 1994
A Systematic Study of Dugaldia (Compositae)Mark W. Bierner · Brittonia · 1974
The Taxa of Helenium in TennesseeMark W. Bierner · Castanea · 1974
TAXONOMY OF HELENIUM SECT. AMARUM (ASTERACEAE)MARK W. BIERNER · SIDA, Contributions to Botany · 1989
TAXONOMY OF HELENIUM SECT. ACTINEA (ASTERACEAE)MARK W. BIERNER · SIDA, Contributions to Botany · 1987
PRESENT STATUS OF AMBLYOLEPIS (ASTERACEAE: HELIANTHEAE)Mark W. Bierner · Madroño · 1990
The Taxonomy of Helenium sect. Cephalophora (Asteraceae)Mark W. Bierner · Systematic Botany · 1978