scholarly journals Deschampsia cespitosa subsp. parviflora (Poaceae) - an overlooked woodland grass

2019 ◽  
Vol 1 (2) ◽  
pp. 117-127
Author(s):  
Andy Amphlett
Keyword(s):  
Current Distribution ◽  
Leaf Blade ◽  
Surface Appearance ◽  
Adaxial Surface ◽  
Deschampsia Cespitosa ◽  
Flat Surfaces ◽  
Distribution Mapping ◽  
Bright Green

Deschampsia cespitosa (L.) P. Beauv. subsp. parviflora (Thuill.) Dumort was, to British and Irish botanists, a little known taxon prior to1988, and current distribution mapping shows a marked geographical recording bias. It is confirmed as being primarily a woodland taxon, at low altitudes; modal mean altitude 50-75 m AOD, with 97% of locations at ≤300 m AOD. A combination of woodland or shaded habitat, bright green narrow leaves, and delicate panicle, with small spikelets, is suggestive of subsp. parviflora. In combination, degree of leaf blade scabridity on the adaxial surface, appearance of papillae on flat surfaces of adaxial ridges of the leaf, and spikelet length, provide the most reliable means of distinguishing this subspecies from subsp. cespitosa. There is no reason to suspect that subsp. parviflora is increasing, rather it had previously been overlooked.

A new critically endangered species of Bertolonia (Melastomataceae, Bertolonieae) from Espírito Santo, Brazil

Phytotaxa ◽  
2020 ◽  
Vol 460 (1) ◽  
pp. 89-96
Author(s):  
LUCAS F. BACCI ◽  
DIEGO TAVARES IGLESIAS ◽  
RENATO GOLDENBERG
Keyword(s):  
New Species ◽  
Endangered Species ◽  
Endemic Species ◽  
Leaf Blade ◽  
Critically Endangered ◽  
Adaxial Surface ◽  
Espírito Santo ◽  
Critically Endangered Species ◽  
Espirito Santo ◽  
Iucn Criteria

We describe here Bertolonia lucernula, a new endemic species from the state of Espírito Santo, Brazil. It is only known from one locality, the “Área de Proteção Ambiental Mestre Álvaro”, in the municipality of Serra. The new species can be recognized by the branches and petioles covered with sessile and short-stalked glands and scattered unbranched trichomes, flat leaf blade surfaces covered only with sessile and short-stalked glands, small flowers with a widely campanulate hypanthium covered with the same trichomes as the petioles, calyx with membranaceous, truncate sepals, and short, triangular external teeth, asymmetric and obovate petals, with the apex covered with sessile and short-stalked glands on the adaxial surface. According to IUCN criteria, Bertolonia lucernula should be classified as Critically Endangered (CR).

scholarly journals Current Distribution Mapping for PEMFCs

2015 ◽  
Vol 174 ◽  
pp. 1253-1260 ◽  
Author(s):  
V. Lilavivat ◽  
S. Shimpalee ◽  
J.W. Van Zee ◽  
H. Xu ◽  
C.K. Mittelsteadt
Keyword(s):  
Current Distribution ◽  
Distribution Mapping

scholarly journals Primulina crassirhizoma sp. nov. (Gesneriaceae) from a limestone area along the boundary of Sino-Vietnam

2013 ◽  
Vol 20 (2) ◽  
pp. 129-134 ◽  
Author(s):  
Bo Zhao ◽  
Xin Hong ◽  
Shi-Lian Huang ◽  
Fang Wen
Keyword(s):  
New Species ◽  
Leaf Blade ◽  
Adaxial Surface ◽  
Flower Shape ◽  
Plant Taxon ◽  
A New Species

Primulina crassirhizoma F. Wen, Bo Zhao & Xin Hong, a new species from a limestone area along the boundary of Sino-Vietnam, is described and illustrated. It is similar to P. linearifolia and P. longgangensis in leaf and flower shape, but can be distinguished by extremely strong rhozime, with conspicuous internodes, leaf blade adaxial surface nitid, sparsely appressed strigose, lateral veins 6–8 on each side of midrib, calyx narrowly triangular to narrowly ovate, corolla pale purple to bluish purple, c. 3.5 cm long, tubenearly tubular, adaxial lip c. 6 mm, abaxial lip 8-9 mm, glabrous anthers and staminodes 3.DOI: http://dx.doi.org/10.3329/bjpt.v20i2.17387Bangladesh J. Plant Taxon. 20(2):129-134, 2013

Characterization of stomatal development in Dianthus chinensis

1988 ◽  
Vol 66 (1) ◽  
pp. 142-149 ◽  
Author(s):  
Thalia Pappas ◽  
Patricia McManus ◽  
Peter Vanderveer ◽  
Judith Croxdale
Keyword(s):  
Leaf Blade ◽  
Leaf Surface ◽  
Guard Cells ◽  
Stomatal Development ◽  
Stomatal Frequency ◽  
Stomatal Complex ◽  
Adaxial Surface ◽  
Abaxial Leaf Surface ◽  
Area Basis

Stomatal differentiation in Dianthus chinensis leaves was characterized structurally and functionally using plants of the seventh plastochron. Development of stomata was followed using scanning electron microscopy. The maturity of the stomatal complex, the existence of an open stomatal pore, and the localization of K+ within guard cells were used as indicators of stomatal function. The results showed that stomatal development spanned a 10- to 12-day period, which began on the fourth youngest pair of leaves and was completed in the middle of the blade of the sixth youngest leaf pair where stomatal function was acquired. Stomatal frequency on an area basis decreased from the base to the tip of the leaf blade and from the abaxial to the adaxial surface of the leaf. There was a 10-fold decline in the frequency of stomata during leaf maturation; frequency on the abaxial leaf surface was about twice that on the adaxial surface. Dimensions of the antechamber aperture changed during development but at maturity exhibited a range of lengths and widths that was independent of stomatal location on the leaf. The localization of K+ in guard cells occurred only in the later stages of differentiation and was absent in stomata of senescing leaves.

scholarly journals DC current distribution mapping system of the solar panels using a HTS-SQUID gradiometer

2014 ◽  
Vol 507 (4) ◽  
pp. 042026 ◽  
Author(s):  
Shingo Miyazaki ◽  
Syohei Kasuya ◽  
Mohd Mawardi Saari ◽  
Kenji Sakai ◽  
Toshihiko Kiwa ◽  
...  
Keyword(s):  
Current Distribution ◽  
Solar Panels ◽  
Mapping System ◽  
Distribution Mapping ◽  
Dc Current

Phyllagathis guidongensis (Melastomataceae), a new species from Hunan, China

Phytotaxa ◽  
2016 ◽  
Vol 263 (1) ◽  
pp. 58 ◽  
Author(s):  
JING TIAN ◽  
LING PEN ◽  
JIAN-CHENG ZHOU ◽  
XUE-HUI TIAN ◽  
REN-YUAN YI ◽  
...  
Keyword(s):  
New Species ◽  
Leaf Blade ◽  
Hunan Province ◽  
Adaxial Surface ◽  
A New Species

Phyllagathis guidongensis K. M. Liu & J. Tian, a new species of Melastomataceae from Hunan Province, China, is described and illustrated. The new species is similar to Phyllagathis stenophylla, but it is obviously different from the latter by its creeping stolons 10–30 cm long, prostrate lower part of the stems narrowly elliptic leaf blade, 1.8–3.0 × 0.5–1.0 cm, apex obtuse or shortly acuminate, both sides sparsely covered with bristles and villose, adaxial surface densely covered with yellow glandular dots solitary flowers, and capsules not obviously angulate.

A method of estimating stomatal density in Paspalum notatum (Poaceae)

2001 ◽  
Vol 49 (5) ◽  
pp. 579 ◽  
Author(s):  
Marisa Santos ◽  
Paulo Luiz de Oliveira ◽  
Flávio Costa Miguens
Keyword(s):  
Cross Section ◽  
Leaf Blade ◽  
Morphological Character ◽  
Unit Area ◽  
Stomatal Density ◽  
Paspalum Notatum ◽  
Frontal View ◽  
Adaxial Surface ◽  
Leaf Surfaces ◽  
Stomatal Number

Stomatal density was recorded on adaxial and abaxial leaf surfaces of Paspalum notatum var. notatum FlÜgge. As in other Poaceae, stomata observation and counting were very difficult from a frontal view because of the morphology of the P. notatum (bahiagrass) leaves: the leaf blade is extremely sinuous on its adaxial surface and trichomes or papillae can hide the stomata. The stomatal number per unit area was determined on both adaxial and abaxial leaf surfaces by using two methods: frontal view and leaf blade cross-section. From these results, we concluded that the use of a cross-section to determine the stomatal density in these plants is the most suitable. Such a method can be used for any plants with stomata organised in longitudinal rows and having a morphological character that makes observation of the stomata difficult.

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