R. metternichii var. micranthum
Photo by Hideo Suzuki
See Cover Article

The Quarterly Bulletin
of the
American Rhododendron Society

Spring 1976
Vol. 30 No. 2

Published quarterly by the AMERICAN RHODODENDRON SOCIETY, Rt. 2, Box 254, Aurora, Oregon. Membership subscription to the American Rhododendron Society $12 a year. The Quarterly Bulletin of the American Rhododendron Society is included as a benefit of membership. Copyright 1976 by the American Rhododendron Society. Permission to reprint any portion of this volume must be granted in writing by the Society.

Issue Contents
Azaleas as Refugees and Colonists on the Volcanoes by Frank Doleshy		A Half Century of Rhododendrons at Seacrest Arboretum by John E. Ford
Phosphorus by Bob Badger		Calcium - A Needed Element by R. L. Ticknor
Azaleas of the Obtusum Subseries at Winterthur by Hal Bruce		Endangered and Threatened Rhododendron Species by Byron Vernimb
1976 ARS Annual Meeting Annual Meeting Program		A Visit to Hong Kong by P. G. Valder
Rhododendron Breeders Roundtable 1976		Rhododenutrition by Dave Goheen
A Growing Medium for Malesian Rhododendrons by Arthur W. Headlam		Pukeiti Rhododendron Trust to Celebrate 25th Jubilee by Graham Smith
R. metternichii var. micranthum by Hideo Suzuki		R. campylogynum var. cremastum by Harold Greer
A New Malesian Hybrid by P. H. Brydon		More on R. vemicosum aff. 18139 by Ray and Jane Goodrich
Behold a Gardener's Best Friend - The Earthworm by Art Frazer		A Good Natural Fertilizer for Rhododendrons by Frank Packard
Incubation Temperature and Pollen Tube Growth in Rhododendron: A Preliminary Report by Robert J. Campbell		Propagation of Evergreen Azaleas by R. D. Welshmer
		Rhododendron Monograph in Preparation
Lewis County Chapter Bronze Medal 1975		Arthur O. "Art" Wright 1907-1975 by Howard Slonecker
ARS Plant Registry		ARS Show Dates
Princeton Chapter Bronze Medals		Letter to the Editor from T. Lelliott
		Advertisements

OFFICERS
President	Eastern Vice President	Western Vice President
DR. AUGUST KEHR	FRED GALLE	E C BROCKENBROUGH
Secretary-Treasurer	Executive Secretary	Editor
TED VAN VEEN	BERNICE J. LAMB	MOLLY GROTHAUS

BOARD OF DIRECTORS
1976
WARREN BERG - JOHN P. EVANS - THOMAS W. KOENIG - ED EGAN
1977
ESTHER BERRY - ARTHUR DOME - GEORGE W. CLARKE - HENRY A SCHANNEN
1978
SIDNEY BURNS - DR L KEITH WADE - FRANKLIN WEST - ERNEST YELTON

PRESIDENTS OF CHAPTERS
AZALEA	LEWIS COUNTY	OLYMPIC PENINSULA	SOUTHERN CALIFORNIA
Frank A. Smith	Antone Johson	Mrs Robert S Lockhart	Carl Deul
BIRMINGHAM	MASSACHUSETTS	PHILADELPHIA	SOUTHEASTERN
R. D. Welshmer	Jack Cowles	George W. Muller Jr.	Mrs Ann Richardson
CALIFORNIA	MIDDLE ATLANTIC	PIEDMONT	SOUTHWESTERN OR
Hadley Osborn	Kenneth McDonald	Daniel H Rumple Jr.	Tom Drake
CONNECTICUT	MIDWEST	PORTLAND	TACOMA
Rudolph Berg	Tom Homer	Edgar H Olsen	Dan Morris
DENMARK	MOHAWK-HUDSON	POTOMAC VALLEY	TAPPAN ZEE
Palle Kristensen	Mrs Helen Breeze	S E Saunders	Emil V Bohnel
EUGENE	MONTEREY BAY	PRINCETON	TIDEWATER
Ed Siegmund	Mrs Marie Oleson	Richard P Clark	Cdr. Ian E. M. Donovan
GRAYS HARBOR	NEW JERSEY	SAN MATEO	TUALATIN VALLEY
Mrs Harry Sprangler	M. S. Ahlen	Marge Farwell	Ralph Shumm
GREAT LAKES	NEW YORK	SEATTLE	VALLEY FORGE
Otto Prycl	Dorothy Schlaikjer	David Bledsoe	Carol J High, VMD
INDIANAPOLIS	NORTH KITSAP	SHELTON	VANCOUVER, B. C.
Lloyd Hahn	Marshall Major	Dr Louis H. Bock	Milton Wildong
JUAN de FUCA	OLYMPIA	SIUSLAW	WILLIAM BARTRAM
Robert E Wells	William Melton	Bruce Pratt	Henry C. Burdette
EDITORIAL BOARD
P H BRYDON, Chairman, Portland Chapter - HADLEY OSBORN, California Chapter
DR. HARRY HOITINK, Great Lakes Chapter - FRED KNAPP, New York Chapter
FRED GALLE, Middle Atlantic Chapter

ADVERTISING RATES FOR THE A.R.S. BULLETIN Copy should be received six weeks preceding date of publication.
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For information on membership, publications, and advertising write to the Executive Secretary, Bernice J. Lamb, Portland OR.  Send advertising copy and material for the Bulletin to Molly M. Grothaus, Lake Oswego, OR.