Results 31 to 40 of about 1,714 (156)

Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution

open access: yesThe Scientific World Journal, Volume 7, Issue 1, Page 247-263, 2007., 2007
The forests of the San Bernardino Mountains have been subject to ozone and nitrogen (N) deposition for some 60 years. Much work has been done to assess the impacts of these pollutants on trees, but little is known about how the diverse understory flora has fared. Understory vegetation has declined in diversity in response to elevated N in the eastern U.
Edith B. Allen   +6 more
wiley   +1 more source

Curtis\u27s botanical magazine. [PDF]

open access: yes, 1870
v.96=ser.3:v.26 (1870) [no.5813 ...
Bentham-Moxon Trust.   +10 more
core   +1 more source

A New Species of Linanthus (Polemoniaceae) from San Bernardino County, California [PDF]

open access: yes, 2013
Linanthus bernardinus is described as new from San Bernardino County, California. It is morphologically similar to L. killipii and L. orcuttii subsp. pacificus but differs from plants of these taxa in height, corolla length, seed morphology, and habitat.
Bell, Duncan S, Fraga, Naomi S
core   +3 more sources

Estudio florístico de la parte central de la barranca nenetzingo, municipio de Ixtapan de la sal, Estado de México [PDF]

open access: yes, 2010
No se cuenta todavía con un inventario completo de plantas que existen en el territorio mexicano. Aún quedan grupos por conocer y zonas del país sin explorar. En tal situación se encuentra la barranca Nenetzingo, Ixtapán de la Sal, Estado de México.
KOCH OLT, STEPHEN DOUGLAS   +9 more
core  

The content of heavy metals in the leaves of Hypericum perforatum L. on serpentinite soils in Serbia [PDF]

open access: yes, 2008
St John's wort is one of the best known and used medicinal plants. The demands for St John's wort in Serbia is still supplied by the collection of native plants.
Belanović Snežana   +2 more
core   +1 more source

Scanning Electron Microscopic Studies on Leaf Surface in Populations of Urginea Indica Kunth Liliaceae [PDF]

open access: yes, 2013
Scanning electronic microscopic observations on leaf surface in ten populations of Urginea indica of the tribe scilleae are presented. Leaf cuticular ornamentation, stomatal variations and differences, in wax deposition and stomatal frequency play an ...
Geetha, H.L.   +2 more
core  

Decision memo: Meisner special use permit [PDF]

open access: yes, 2006
5 pp. T.17 S., R. 20 E., Section 22. Captured May 29, 2006.Announces decision to issue a new special use permit for Kyle E. Meisner to occupy and use National Forest System land to collect and transport water for domestic use.
Lookout Mountain Ranger District (Or.)
core  

Rediscovery and status of Cylindera (s. str.) lunalonga (Schaupp, 1884) (Coleoptera: Carabidae: Cicindelinae) in the San Joaquin Valley of California with a comparison to a Sierra Nevada population [PDF]

open access: yes, 2013
Surveys for adult Cylindera (s. str.) lunalonga (Schaupp) (Coleoptera: Carabidae: Cicindelinae) were conducted between 2001 and 2011 at over 80 sites throughout the species’ historic range in the San Joaquin Valley and Sierra Nevada Mountains of ...
Haines, R. Dennis   +2 more
core  

Demographic viability of populations of \u3cem\u3eSilene regis\u3c/em\u3e in midwestern prairies: relationships with fire management, genetic variation, geographic location, population size and isolation [PDF]

open access: yes, 1998
We studied the demographic viability of populations of a long-lived iteroparous prairie perennial, Silene regia, in relation to management regimes, population sizes, geographical region (Ohio and Indiana vs.
Dolan, Rebecca W., Menges, Eric S.
core   +1 more source

Adaptive Radiation, Ecological Opportunity, and Evolutionary Determinism [PDF]

open access: yes, 2012
Adaptive radiation refers to diversification from an ancestral species that produces descendants adapted to use a great variety of distinct ecological niches.
Losos, Jonathan
core   +1 more source

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