TY - JOUR T1 - Chromosome numbers of Hedeoma (Labiatae) and related genera JF - Systematic Botany Y1 - 1976 A1 - RS Irving SP - 46–56 VL - 1 ER - TY - JOUR T1 - Artificial hybridization in Hedeoma (Labiatae) JF - Systematic Botany Y1 - 1979 A1 - RS Irving A1 - HS Brenholts A1 - DD Irving SP - 1–15 ER -