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Specimen ID
Determination *
Collector
Collection Date
Collection Number
County
Locality
Elevation in meters
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CAS-BOT-BC226794
Rhododendron occidentale
G. F. Hrusa
1989-6-7
7174
Sonoma
Above Franz Valley School Rd. immed. W of Sonoma/Napa Co. line
259
Comment
CAS-BOT-BC226795
Rhododendron occidentale
G. F. Hrusa
1989-5-8
7003
Sonoma
Hogback Mtn. at headwaters of Agua Caliente and Nathanson Creeks NE of Sonoma
518
Comment
CAS-BOT-BC227427
Rhododendron occidentale
G. F. Hrusa
1988-4-22
5567
Sonoma
Cavedale Rd. between Hwy 12 and Hwy 29
300
Comment
CAS-BOT-BC229008
Rhododendron occidentale
G. F. Hrusa
1989-6-7
7176
Sonoma
Above Franz Valley School Rd. immed. W of Sonoma/Napa Co. line
259
Comment
CAS-BOT-BC56662
Rhododendron occidentale
Greg de Nevers
1996-5-31
10822
Sonoma
Pepperwood Ranch Natural Preserve. 3450 Franz Valley Road. on Oak Hill Ranch
487
Comment
CDA21389
Rhododendron occidentale
G. F. Hrusa
1989-5-21
7036
Sonoma
Austin Creek State Recreation Area; Canyon of Gilliam Creek at base of slope below Redwood Lake.
198
Comment
CDA21390
Rhododendron occidentale
G. F. Hrusa
1989-5-21
7050
Sonoma
North Coast Ranges; Austin Creek State Recreation Area. Canyon of Gilliam Creek at base of slope below Redwood Lake.
198
Comment
CDA43236
Rhododendron occidentale
G. F. Hrusa
1989-5-21
7035
Sonoma
Austin Creek State Recreation Area; Canyon of Gilliam Creek at base of slope below Redwood Lake.
198
Comment
CLARK-A1528-5112
Rhododendron occidentale
John C. Roos
1957-7-2
6645
Sonoma
Miller Ridge
Comment
POM131866
Rhododendron occidentale
Edward L. Greene
1894-6-17
s.n.
Sonoma
Mt. St. Helena.
Comment
SFV2671
Rhododendron occidentale
K. A. Wilson
1961-6-23
1236
Sonoma
2 miles north of Sebastopol on CA-Highway 12.
27
Comment
UC1084452
Rhododendron occidentale
G. Thomas Robbins
1937-5-23
204
Sonoma
10 mi w of Santa Rosa (Vine Hill Region, Pitkin Ranch); Vine Hill Region, Pitkin Ranch
Comment
UC1299570
Rhododendron occidentale
Freed W. Hoffman
1946-9-26
569
Sonoma
Layton Mine, Austin Creek Austin Creek; North Coast Ranges, Layton Mine, Austin Creek
Comment
UC157681
Rhododendron occidentale
Milo S. Baker
May, 1899
Sonoma
near Forestville
Comment
UC22146
Rhododendron occidentale
W. H. Brewer
1861-11-9
859
Sonoma
nw of Mount St. Helena
Comment
UC22148
Rhododendron occidentale
Edw. L. Greene
1894-6-7
Sonoma
Mount St. Helena
Comment
UC634736
Rhododendron occidentale
H. L. Mason
1934-4-28
8066
Sonoma
Head of Dohrman Creek, Jensen's Ranch Dohrman Creek; , Jensen's Ranch
Comment
UC750808
Rhododendron occidentale
Charles B. Heiser Jr.
1946-5-19
1750
Sonoma
Vine Hill Region, Pitkin Marsh Pitkin Marsh; Vine Hill Region, Pitkin Marsh
Comment
UCD117916
Rhododendron occidentale
Chris Bowen
1974-5-18
113
Sonoma
Unit 24 Owners' Map, Sea Ranch, near State Highway 1.
Comment
UCD117929
Rhododendron occidentale
K. Esau
1933-7-8
s.n.
Sonoma
Near Petrified Forest.
Comment
UCD117936
Rhododendron occidentale
Charles B. Heiser Jr.
1946-5-19
1750
Sonoma
Vine Hill region, Pitkin Marsh.
Comment
UCD141958
Rhododendron occidentale
G. F. Hrusa
1989-5-8
7009
Sonoma
Hogback Mtn. at headwaters of Agua Caliente and Nathanson Creeks NE of Sonoma.
518
Comment
UCR23636
Rhododendron occidentale
John C. Roos
1957-7-2
6645
Sonoma
Miller Ridge
Comment
UCSB4804
Rhododendron occidentale
Kamb, Peter; Chisaki, Francia
1950-6-16
Sonoma
Pitkin Marsh, northwest of Sebastopol, 1 mile north of Sousa Corners
Comment
SBBG35387
Rhododendron occidentale
N. F. Sommer
1954-5-15
84
Sonoma
State Hwy 12, 3.6 mi W of Sebastopol
30
Comment
SEINET11993488
Rhododendron occidentale
F. H. Utech
1986-1
86 -114
Sonoma
ca 6 mi NE on Cavedale Road from junction with CA 12
600
Comment
UCD117913
Rhododendron occidentale
Donna Allen
1977-5-24
s.n.
Sonoma
30 miles on Dry Cr. Road to Stewart's Pt.
Comment
UCD117949
Rhododendron occidentale
George F. Hrusa
1989-5-8
7008
Sonoma
At headwaters of Nathanson Creek directly E of town of Sonoma.
390
Comment
UCD117989
Rhododendron occidentale
J. M. Tucker
1952-5-4
2361
Sonoma
On bank of the Wheatfield Fork of the Gualala River, beside road from Geyserville to Stewart's Point, ca. 12 miles east of Stewart's Point.
Comment
CAS-BOT-BC200334
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1957-5-11
3325
Sonoma
Near Occidental-Graton road, 2.7 miles east of Occidental
Comment
CAS-BOT-BC200335
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1960-6-11
4502
Sonoma
Laguna de Santa Rosa area east of Graton, betw. Occidental and Guerneville rds.
Comment
CAS-BOT-BC200337
Rhododendron occidentale var. occidentale
A. A. Heller
1902-6-24
5749
Sonoma
Near Burke's Sanitarium
Comment
CAS-BOT-BC200338
Rhododendron occidentale var. occidentale
Volney Rattan
1877-6-17
s.n.
Sonoma
Guerneville
Comment
CAS-BOT-BC200339
Rhododendron occidentale var. occidentale
H. E. McMinn
1922-6-7
181
Sonoma
Near Monte Rio
Comment
CAS-BOT-BC200340
Rhododendron occidentale var. occidentale
Peter Rubtzoff; Nancy Harrison
1978-6-11
9210
Sonoma
Cunningham Marsh area. On north side of Blucher Creek valley
Comment
CAS-BOT-BC200341
Rhododendron occidentale var. occidentale
Mrs. E. C. Sutliffe
1920-7-18
s.n.
Sonoma
Annapolis
Comment
CAS-BOT-BC200342
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1955-5-21
1856
Sonoma
Forestville Marsh. North facing slope bordering the Marsh in the south
Comment
CAS-BOT-BC200343
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1970-6-6
6254
Sonoma
Bloomfield Road. 4 1/4 mi. northeast of Bloomfield
Comment
CAS-BOT-BC200344
Rhododendron occidentale var. occidentale
Barbara Dows
1907-7-12
s.n.
Sonoma
Sebastopol
Comment
CAS-BOT-BC200345
Rhododendron occidentale var. occidentale
John H. Thomas
1955-5-22
5190
Sonoma
Graton - Occidental Road, about 3.5 miles west of Occidental
60
Comment
CAS-BOT-BC200346
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1951-6-17
277
Sonoma
Northern half of Lower Marsh
Comment
CAS-BOT-BC200347
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1951-6-2
89
Sonoma
Uppermost part of the western branch of the Upper Marsh
Comment
CAS-BOT-BC200348
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1959-6-7
4106
Sonoma
Bank of Russian River betw. East Guernewood and Vacation Beach, near Guerneville
Comment
CAS-BOT-BC200349
Rhododendron occidentale var. occidentale
Mary P. Wells
1984-8-8
433 B
Sonoma
Deer Trail Road north of present end. The Sea Ranch
Comment
CAS-BOT-BC200350
Rhododendron occidentale var. occidentale
Peter Rubtzoff
1951-6-2
89
Sonoma
Uppermost part of the western branch of the Upper Marsh
Comment
CAS-BOT-BC227170
Rhododendron occidentale var. occidentale
G. F. Hrusa
1988-4-22
5569
Sonoma
Cavedale Rd. between Hwy 12 and Hwy 29
300
Comment
CDA21337
Rhododendron occidentale var. occidentale
G. F. Hrusa
1989-6-7
7177
Sonoma
North Coast Ranges; Above Franz Valley School Rd. immed. W of Sonoma/Napa Co. line.
259
Comment
CDA21375
Rhododendron occidentale var. occidentale
G. F. Hrusa, M. Griffiths
1989-6-4
7096
Sonoma
North Coast Ranges; Hogback Mtn. at headwaters of Agua Caliente and Nathanson Creeks NE of Sonoma.
Comment
CDA21383
Rhododendron occidentale var. occidentale
G. F. Hrusa, M. Griffiths
1989-6-4
7116
Sonoma
North Coast Ranges; Hogback Mtn. at headwaters of Agua Caliente and Nathanson Creeks NE of Sonoma.
Comment
CDA32767
Rhododendron occidentale var. occidentale
G. F. Hrusa
1988-5-18
5576
Sonoma
Outer North Coast Ranges; W side of Hwy 1 between Salt Point State Park and Kruse Ranch rd.
30
Comment
CDA32768
Rhododendron occidentale var. occidentale
G. F. Hrusa
1990-6-2
8065
Sonoma
Outer North Coast Ranges; Skagg's Springs road from Stewart's Point, approx. 1 mile inland from Hwy 1.
91
Comment
CDA32769
Rhododendron occidentale var. occidentale
G. F. Hrusa
1990-6-2
8062
Sonoma
Outer North Coast Ranges; Skagg's Springs road from Stewart's Point, approx. 1 mile inland from Hwy 1.
91
Comment
CDA32770
Rhododendron occidentale var. occidentale
G. F. Hrusa, T. D. Wilfred
1992-5-26
9488
Sonoma
Outer North Coast Ranges; Kortum Canyon Rd., near its intersection with Hwy 29 in town of Calistoga.
121
Comment
CHSC114305
Rhododendron occidentale var. occidentale
G. F. Hrusa
1989-5-8
7006
Sonoma
North Coast Ranges. Hogback Mtn. at headwaters of Agua Caliente and Nathanson Creeks NE of Sonoma.
518
Comment
POM131901
Rhododendron occidentale var. occidentale
A. A. Heller
1902-6-24
5749
Sonoma
Near Burke's Sanitarium
Comment
RSA133726
Rhododendron occidentale var. occidentale
John H. Thomas
1955-5-22
5190
Sonoma
Graton-occidental Road about 3.5 miles west of Occidental.
61
Comment
RSA256986
Rhododendron occidentale var. occidentale
Gary D. Wallace
1973-5-18
1201
Sonoma
East of Santa Rosa on Guerneville Rd to .25 miles east of Jct. with Hwy 116, then north on Vine Hill Rd. to Pitkin Tree Farm.
Comment
RSA787919
Rhododendron occidentale var. occidentale
G. Fred Hrusa
1989-5-8
6091
Sonoma
Hogback Mountain at headwaters of Agua Caliente and Nathanson Creeks NE of Sonoma.
518
Comment
CAS-BOT-BC200336
Rhododendron occidentale var. occidentale
Walter Knight; Irja Knight
1964-2-27
557
Sonoma
Ca. 2 mi. S. Gualala on hiway #1
Comment
CDA16153
Rhododendron occidentale var. occidentale
R. Gross
1999-7-2
s.n. 1
Sonoma
North Coast Ranges; NW side of Mt. St. Helena, seep below Ida Clayton Rd. (3 separate inds. on sheet.)
0
Comment
CDA16156
Rhododendron occidentale var. occidentale
R. Gross
1999-7-7
s.n. 2
Sonoma
North Coast Ranges; NW side of Mt. St. Helena, below Ida Clayton Rd.
0
Comment
CDA38886
Rhododendron occidentale var. occidentale
T. C. Fuller
1958-5-24
3987
Sonoma
Pitkin Marsh, near Forestville.
0
Comment
CDA38887
Rhododendron occidentale var. occidentale
T. C. Fuller
1958-5-24
3987
Sonoma
Pitkin Marsh, near Forestville.
0
Comment
RSA177963
Rhododendron occidentale var. occidentale
R. F. Thorne
1965-4-20
34382
Sonoma
Charles Newman's place up Los Alamos Rd, on Rincon Ridge
396
Comment
RSA71061
Rhododendron occidentale var. paludosum
L. S. Rose
1951-6-7
51013
Sonoma
Pitkin Marsh, 5 miles N of Sebastopol.
Comment
CAS-BOT-BC200354
Rhododendron occidentale var. paludosum
M. S. Baker
1898-6-11
s.n.
Sonoma
Sulphur Creek
Comment
RSA94351
Rhododendron occidentale var. paludosum
Peter Rubtzoff
1951-6-17
277
Sonoma
Northern half of Lower Marsh; in a thicket
Comment