Generic relationships within Leonticeae (Berberidaceae)

1989 ◽  
Vol 67 (8) ◽  
pp. 2310-2316 ◽  
Author(s):  
Henry Loconte ◽  
James R. Estes
Keyword(s):  
North America ◽  
Morphological Characters ◽  
Eastern North America ◽  
Eastern Asia ◽  
Operational Taxonomic Units ◽  
Generic Relationships

Phenetic analyses of morphological characters of Leonticeae reveal three distinct groups of operational taxonomic units corresponding to genera. The genera Leontice and Gymnospermium of Eurasia are pheneticlly equidistant from Caulophyllum, which occurs in eastern Asia and eastern North America. On the basis of phenetic similarity, L. kiangnanensis is transferred to Gymnospermium as G. kiangnanensis.

scholarly journals Slender Moonwort, Botrychium lineare (Ophioglossaceae), Rediscovered in Quebec

2009 ◽  
Vol 123 (3) ◽  
pp. 255 ◽  
Author(s):  
Jacques Cayouette ◽  
Donald R. Farrar
Keyword(s):  
North America ◽  
Plant Species ◽  
Morphological Characters ◽  
Ongoing Study ◽  
Eastern North America ◽  
Allozyme Electrophoresis ◽  
Spore Size ◽  
Habitat Features ◽  
Gaspe Peninsula ◽  
Made In

Slender Moonwort (Botrychium lineare), described in 1994, is a very rare fern in eastern North America. It was known in Quebec, Canada, from only two sites in the Gaspé Peninsula but has not been relocated since its discovery at these sites in 1902 and 1942. An ongoing study of B. lineare and its recent discovery in northern Minnesota prompted a re-examination of a 1972 collection made in western Quebec, in Gatineau Park, previously identified under various names, including B. campestre. A recent visit (2008) to the Gatineau Park site disclosed continued presence of similar plants. Based on morphological characters, spore size, genotype (allozyme electrophoresis), and appropriate habitat features, we conclude that the newly discovered plants and those of the 1972 collection are B. lineare. B. lineare appears on the Quebec government list of plant species likely to be designated threatened or vulnerable.

scholarly journals Evolution of biogeographic disjunction between eastern Asia and eastern North America in Phryma (Phrymaceae)

2006 ◽  
Vol 93 (9) ◽  
pp. 1343-1356 ◽  
Author(s):  
Z.-L. Nie ◽  
H. Sun ◽  
P. M. Beardsley ◽  
R. G. Olmstead ◽  
J. Wen
Keyword(s):  
North America ◽  
Eastern North America ◽  
Eastern Asia

Polyphyly of the Padus group of Prunus (Rosaceae) and the evolution of biogeographic disjunctions between eastern Asia and eastern North America

2012 ◽  
Vol 126 (3) ◽  
pp. 351-361 ◽  
Author(s):  
Xiao-Lin Liu ◽  
Jun Wen ◽  
Ze-Long Nie ◽  
Gabriel Johnson ◽  
Zong-Suo Liang ◽  
...  
Keyword(s):  
North America ◽  
Eastern North America ◽  
Eastern Asia

Morphometric studies of the Euphorbia esula group (Euphorbiaceae) in North America

1990 ◽  
Vol 68 (9) ◽  
pp. 1978-1988 ◽  
Author(s):  
C. W. Crompton ◽  
A. E. Stahevitch ◽  
W. A. Wojtas
Keyword(s):  
North America ◽  
Morphological Characters ◽  
Leafy Spurge ◽  
Principal Coordinate Analysis ◽  
Euphorbia Esula ◽  
Eastern North America ◽  
Single Variable ◽  
Authentic Material ◽  
Variable Species ◽  
Euphorbia Cyparissias

Leafy spurge and cypress spurge are important weeds of pastures and unimproved rangeland in western and eastern North America, respectively. Taxonomists disagree as to whether leafy spurge is a single variable species or an aggregate of two or more species. Morphometric techniques (clustering by incremental sum of squares and principal coordinate analysis) were used to analyze relationships in leafy spurge and its allies. On the basis of studying 26 morphological characters found in 200 collections representing 32 putative taxa, we concluded that in North America only four species should be recognized, namely, Euphorbia agraria Bieb., Euphorbia cyparissias L., Euphorbia esula L., and Euphorbia ×pseudoesula Schur. A key to these taxa is provided. No authentic material of Euphorbia lucida Waldst. & Kitt. and Euphorbia salicifolia Host was found from this continent in the collections we examined.

New species of the Diaporthales from eastern Asia and eastern North America

Mycologia ◽  
2007 ◽  
Vol 99 (6) ◽  
pp. 916-923 ◽  
Author(s):  
L. N. Vasilyeva ◽  
A. Y. Rossman ◽  
D. F. Farr
Keyword(s):  
New Species ◽  
North America ◽  
Eastern North America ◽  
Eastern Asia

Ambrosia Beetles of the Tribe Xyloterini (Coleoptera: Scolytidae) in North America

1957 ◽  
Vol 89 (8) ◽  
pp. 337-354 ◽  
Author(s):  
Stephen L. Wood
Keyword(s):  
North America ◽  
Eastern North America ◽  
Eastern Asia ◽  
Ambrosia Beetles

The tribe Xyloterini is widely distributed in the Holarctic realm. It is comprised of three rather small but well known genera. The largest of these, Trypodendron Stephens, consists of about a dozen species and occurs throughout the Holarctic realm; five of these species occur in North America. Dendrotrypum Schedl contains six species that are known only from eastern Asia. Xyloterinus Swaine contains one species from eastern North America.

The Galium trifidum group (Galium sect. Aparinoides, Rubiaceae)

1976 ◽  
Vol 54 (16) ◽  
pp. 1911-1925 ◽  
Author(s):  
C. Puff
Keyword(s):  
North America ◽  
Eastern North America ◽  
Great Lakes Region ◽  
Western North America ◽  
Eastern Asia ◽  
Chromosome Counts ◽  
New Classification ◽  
North Eastern ◽  
North Western

By using morphology, karyology, pollen size, leaf flavonoids, ecological observations, and modification experiments, a new classification of the Galium trifidum group is proposed. Nine taxa in five species are recognized: (1) G. tinctorium, with ssp. tinctorium and sap. floridanum (new comb.) in eastern North America; (2) G. brevipes, a rare species centered in the Great Lakes region; (3) G. trifidum, with ssp. trifidum in northern North America. Asia, and Europe, ssp. columbianum (new comb.) in (north)western North America and (north)eastern Asia, and ssp. subbiflorum (new comb.) and ssp. halophilum (new comb.) in northern North America; (4) G. innocuum in southeastern Asia; (5) G. karakulense in central Asia.New chromosome counts of n = 12 and 2n = 24 are reported for G. tinctorium ssp. tinctorium and ssp. floridanum; and G. trifidum ssp. trifidum, ssp. columbianum, and ssp. subbiflorum.

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