52 BUEEAU OF PLANT QUARANTINE [July-Sept. 
QUARANTINE AND OTHER OFFICIAL ANNOUNCEMENTS 
ANNOUNCEMENT RELATING TO BLACK-STEM-RUST QUARANTINE 
(NO. 38) 
P. Q. C. A.— 320 (Revised) August 15, 1932. 
REVISED LIST OF BARBERRIES AND MAHONIAS CLASSIFIED UNDER BLACK-STEM- 
RUST QUARANTINE REGULATIONS 
As a result of experimental work carried on by the Bureau of Plant Industry, 
it is now possible to classify a number of species and varieties of barberries and 
Mahonias as to rust-susceptibility which have heretofore been doubtful. Ac- 
cordingly in the following list Berberis aemulans, buxifolia, diversifolia, gaigne- 
painii, nervosa, and others are for the first time listed as immune or resistant; 
while B. dulcis nana, japonica (bealei), and levis are now classed as susceptible. 
Further tests are being made on the species shown below in the undetermined 
group, and they will be placed in their proper place in groups B and C as soon as 
sufficient experimental evidence is available. In this revision the barberries and 
Mahonias are included in the same alphabetical group as a matter of convenience. 
The rules and regulations supplemental to Notice of Quarantine No. 38, revised, 
provide that no plants, cuttings, stocks, scions, buds, fruits, seeds, or other 
plant parts capable of propagation, of the genera Berberis, Mahonia, or Maho- 
berberis " shall be moved or allowed to be moved interstate from any State of the 
continental United States or from the District of Columbia into any of the protected 
States, namely, Colorado, Illinois, Indiana, Iowa, Michigan, Minnesota, Montana, 
Nebraska, North Dakota, Ohio, South Dakota, Wisconsin, and Wyoming, nor 
from any one of said protected States into any other protected State, unless a 
permit shall have been issued therefor by the United States Department of Agri- 
culture, except that no restrictions are placed by these regulations on the interstate 
movement of Japanese barberry (Berberis thunbergii) or any of its horticultural 
varieties." [Regulation 2 (a).] 
The protected States referred to below under groups B, C, and D, are the 
13 barberry-eradication States named in regulation 2 (a), quoted above. 
Lee A. Strong, 
Chief, Bureau of Plant Quarantine. 
A. BERBERIS THUNBERGII AND ITS RUST-IMMUNE HORTICULTURAL VARIETIES 
Permits are not required for any interstate movement of Berberis thunbergii 
or of the rust-immune varieties thereof under the regulations of the black-stem- 
rust quarantine, revised. The varieties so far as tested by the department are 
as follows: Berberis thunbergii, B. thunbergii atropurpurea, B. thunbergii maxi- 
mowiczii, B. thunbergii minor, B. thunbergii pluriflora, and B. thunbergii pluri- 
flora erecta. 
B. BERBERIS AND MAHONIA SPECIES OR VARIETIES SUFFICIENTLY RESISTANT TO 
BLACK STEM RUST FOR SHIPMENT INTO PROTECTED STATES 
Permits are required under the regulations of the black-stem-rust quarantine 
for interstate movement of the following species or varieties into the protected 
States and for such movement from any protected State into any other protected 
State : 
Berberis aemulans, B. aquifolium (Mahonia), B. beaniana, B. buxifolia, B. 
candidula, B. chenaultii (hybrid), B. circumserrata, B. concinna, B. darwinii, 
B. dictyophylla var. albicaulis, B. diversifolia, B. edgeworthiana, B. gagnepainii, 
B. julianae, B. koreana, B. nervosa (Mahonia), B. ottawensis (hybrid), B. potanini, 
B. repens (Mahonia), B. sargentiana, B. stenophylla (hybrid), B. triacanthophora, 
and B. verruculosa. 
C. BERBERIS, MAHONIA, AND MAHOBERBERIS SPECIES OR VARIETIES WHICH ARE 
SUSCEPTIBLE TO ATTACK OF BLACK STEM RUST 
Interstate shipments of the following species or varieties must not be made 
into the protected States or from any protected State to any other protected 
State and permits will not be issued for such movement: 
Berberis acuminata, B. aetnensis, B. aggregata, B. aggregata prattii, B. alesuthien- 
sis, B. altaica, B. amurensis, B. amurensis japonica, B. angulosa, B. aristata, B. 
arvensis, B. asiatica, B. atropurpurea, B. atrocarpa, B. bealei {japonica) (Mahonia), 
