Forest Lessons

Author(s):  
Richard Higgins ◽  
Richard Higgins
Keyword(s):  

Botany appealed to the wordsmith as well as the naturalist in Thoreau. “How copious and precise the botanical language!” he enthused in his journal in 1851. He used its precise lexicon to describe trees. The broad flat brown buds on Mr. Cheney’s elm, containing twenty or thirty yellowish-green threads, surmounted with little brownish mulberry cups, which contain the stamens and the two styles—these are just expanding or blossoming now. The flat imbricated buds, which open their scales both ways, have had a rich look for some weeks past. Why so few elms so advanced, so rich now? Are the staminiferous and pistilliferous flowers ever on different trees?...

1904 ◽  
Vol 36 (5) ◽  
pp. 136-136
Author(s):  
John H ◽  
H. Cook

On the 6th of June 1903, we found a Thecla caterpillar unknown to us feeding openly upon the berries of Vaccinium corymbosum. Its general colour was bright yellowish-green, which served to render it comparatively inconspicuous while feeding in the midst of a cluster of the unripe fruit. A faint, draker, dorsal stripe and a very minute coral-red spot in the middle of each segment, just above the lateral fold, were the only markings. The head was of a uniform light brown, and the body was clothed with short pile. Length, 12 mm.


1882 ◽  
Vol 14 (10) ◽  
pp. 199-200 ◽  
Author(s):  
L. W. Goodell

Eggs.—Oblong, covered with hexagonal depressions and bright green in color. Length 0.6 mil.; width 0.3 mil. Duration of egg stage 12 days.Young Larva.—Length 2 mil.; head twice as wide as the body, round and deep ochre yellow; body dull yellowish green with a faint paler stigmatal stripe.Mature Larva.—Body of uniform thickness, deep green with a narrow sub-dorsal and stigmatal white stripe, and a dorsal greenish-white hair line; dorsal space pale green; ventral space yellowish green. Head brownish green with a lateral white stripe which is a continuation of the sub-dorsal stripe of the body. Length at rest 25 to 26 mil.; when crawling, 26 to 27 mil. Food plant, Pinus strobus. Duration of larva stage, 35 to 40 days. Described from 57 specimens.


2019 ◽  
Vol 555 ◽  
pp. 74-80 ◽  
Author(s):  
E. Sreeja ◽  
Remya Mohan P ◽  
Subash Gopi ◽  
Cyriac Joseph ◽  
N.V. Unnikrishnan ◽  
...  

2021 ◽  
Vol 39 (2) ◽  
pp. 126-134
Author(s):  
Manal Al-Nhlaoui ◽  
◽  
Adnan Nizam ◽  
Manal Daghestani ◽  
◽  
...  

This study was conducted during the period 2019–2020 to identify Trichoderma spp. isolated from woody soils and assessing their efficacy for biodegradation of tannins through tannase enzyme activity produced. Results obtained confirmed the presence of two species; Trichoderma citrinoviride, which was isolated from Maysalon area near Damascus, and characterized by yellowish green colony with dense growth of spores at the center of the colony, and Trichoderma brevicompactum isolated from the Balluran area near Lattakia characterized by yellow colonies with concentric rings. Trichoderma citrinoviride had higher biodegradation activity, measured by degrading different tannins concentrations (2, 4, 6%) collected from Queircus coccifera from Bmelka area in Tartous in liquid medium and led to 85, 87 and 90% degradation, for the three concentrations, respectively, following 12 days incubation. The activity of the produced tannase was measured to be 37.9 units/mg. Whereas, the decomposition rate of the three tannin concentrations by Trichoderma brevicompactum reached 67, 80 , 89%, respectively, again after 12 days of incubation, with enzyme activity measured to be 35.2 units/mg. Keywords: Trichoderma, tannins, tannase, biodegradation, enzyme activit


1984 ◽  
Vol 33 ◽  
pp. 115-122
Author(s):  
Guo Fuxiang

The Asian non-marine Cretaceous System may be divided into two geographical provinces: a southern one, dominated by elastic red salt-bearing formations, and a northern one, dominated by elastic grey, yellowish green and black formations containing coal (kukersit). Vertically, on the basis of three trigonioi­dacean assemblages (bivalves), the System may be subdivided into Lower, Middle and Upper Cretaceous, three provincial series exhibiting this tripartite character. 4 zones and 6 subzones of the known trigonioi­daceans are tentatively presented.


2009 ◽  
Vol 63 (12) ◽  
pp. 1096-1098 ◽  
Author(s):  
Xu Li ◽  
Zhiping Yang ◽  
Li Guan ◽  
Qinglin Guo

2012 ◽  
Vol 38 (2) ◽  
pp. 1319-1323 ◽  
Author(s):  
Min-Hang Weng ◽  
Ru-Yuan Yang ◽  
Yu-Ming Peng ◽  
Jian-Liang Chen

2021 ◽  
Vol 29 ◽  
pp. 152-158
Author(s):  
Rocio del Pilar Rojas-Gonzáles ◽  
M. Marcela Mora

Paradrymonia vivianensis R. Rojas & M. M. Mora (Gesneriaceae), a new species discovered in the Chambirillo sector of Cordillera Azul National Park, Peru, is described and illustrated. Paradrymonia vivianensis differs from other members of the genus mainly by its leaves with the leaf blade elliptical to obovate, purplish green above and uniformly purple below, the base subcordate and slightly asymmetric, the margin crenate, and the midvein and secondary veins contrasting yellowish green above.


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