Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 1-67

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 69-91

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 119-127

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 135-138

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 145-177

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 221-250

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 251-258

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 265-270

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 275-322

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 391-451

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 453-486

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, pages 527-552

Published in J. Arnold Arbor, in 1990, in volume 71, pages 567-574

Published in Journal of the Arnold Arboretum, in 1990, in volume 71, issue 1, pages 93-109

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 1, pages 111-118

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 1, pages 139-142

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 2, pages 179-220

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 2, pages 259-264

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 3, pages 323-370

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 3, pages 371-380

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 3, pages 381-384

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 3, pages 385-387

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 3, pages 389-390

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 4, pages 487-526

Published in Journal of The Arnold Arboretum, in 1990, in volume 71, issue 4, pages 575-578