نتایج جستجو برای: sect albidae

تعداد نتایج: 2863  

2013
J.H.C. Woudenberg J.Z. Groenewald M. Binder P.W. Crous

UNLABELLED Alternaria is a ubiquitous fungal genus that includes saprobic, endophytic and pathogenic species associated with a wide variety of substrates. In recent years, DNA-based studies revealed multiple non-monophyletic genera within the Alternaria complex, and Alternaria species clades that do not always correlate to species-groups based on morphological characteristics. The Alternaria co...

ژورنال: The Iranian Journal of Botany 2010

سری Cousinia sect. Leptocephalae ser. Chaetocephalae به سطح بخش با نام Cousinia sect. Chaetocephalae ارتقاء می‌یابد. این بخش با بخش نزدیک خود به نام sect. Leptocephalae با داشتن کپه منفرد در انتهای شاخه‌ها و ساقه‌ها، برگهای ساقه‌ای بدون کشیدگی در امتداد ساقه و جام گل زرد تشخیص داده می شود. از این بخش سه گونه Cousinia crassipes, C. attariae,  C. chaetocephala تشخیص داده می‌شود. گونه C. attariae ...

ژورنال: The Iranian Journal of Botany 2011

تکوین رویان، کیسه رویانی و آندوسپرم در Astragalus eriocarpus (sect. Malacothrix)،  A. glaucacanthus (sect. Poterion)، A. remotijugus (sect. Caprini)، A. chrysostachys (sect. Hymenostegis) و A. compactus (sect. Rhacophorus) بررسی شده است. تخمک‌ها در هر پنج گونه نیمه واژگون هستند و بافت خورش توسط دو پوسته احاطه می‌شود. سفت به واسطه رشد نامتقارن پوسته خارجی، زیگزاکی است. الگوی کلی رویان‌زایی در هر...

2014
Alexander N. Sennikov

Hieracium sinoaestivum Sennikov sp. nov. is described as new to science and illustrated. This presumably apomictic species is solely known from two old collections made in a single locality in the Shanxi Province of China. It belongs to the hybridogenous group Hieracium sect. Aestiva (Hieracium sect. Prenanthoidea × Hieracium sect. Umbellata) and is most similar to Hieracium veresczaginii from ...

2017
M. I. Dyakonov

This introductory chapter is mainly addressed to readers new to the field. In Sect. 1.1 a brief review of the historical roots of the current research is given. Section 1.2 describes various spin interactions. Section 1.3 is a mini text-book on semiconductor physics designed for beginners. A short overview of spin phenomena in semiconductors is given in Sect. 1.4. Finally, Sect. 1.5 presents th...

2016
Yan Wang Qing Chen Tao Chen Haoru Tang Lin Liu Xiaorong Wang

Rubus L. is a large and taxonomically complex genus, species of which exhibit apomixis, polyploidy, and frequent hybridization. Most of Chinese Rubus are assigned in two major sections, Idaeobatus and Malachobatus. To explore the phylogenetic relationships within Chinese Rubus, inferences upon three chloroplast DNA (rbcL, rpl20-rps12, and trnG-trnS), nuclear ribosomal ITS, and two low-copy nucl...

ژورنال: :مجله گیاهشناسی ایران 2003
مصطفی اسدی

دو گونه acantholimon bakhtiaricum و a. mirtadzadinii از ایران نامگذاری و معرفی می گردند. گونه a. bakhtiaricum  متعلق به بخش sect. microstegia و گونه a. mirtadzadinii متعلق به بخش sect. acantholimon  است. گونه a. bakhtiaricum با گونه a. austro-iranicum قرابت زیادی دارد، لیکن در پوشش کرکی و شکل و اندازه برگک با آن تفاوت فاحشی دارد. گونه a. mirtadzadinii با گونه a. demavendicum  شبیه است. تفاوت عم...

2016
Stephen R. Stern Terri Weese Lynn A. Bohs

The Leptostemonum clade of Solanum contains approximately 350–450 species, including the cultivated eggplant, S. melongena . This clade is characterized by the presence of prickles and apically attenuate anthers. Solanum section Androceras , the focus of this study, is a group of ca. 12 species belonging to the Leptostemonum clade. This section is unusual in the genus because of its mostly nort...

2013
Sandra Knapp

The Dulcamaroid clade of Solanum contains 45 species of mostly vining or weakly scandent species, including the common circumboreal weed Solanum dulcamara L. The group comprises members of the previously recognised infrageneric groupings sect. Andropedas Rusby, sect. Californisolanum A. Child, sect. Dulcamara (Moench) Dumort., sect. Holophylla (G.Don) Walp., sect. Jasminosolanum (Bitter) Seithe...

2013
Kenneth Jansen

Finite element technologies have been applied to fluid dynamrcs problems for some time now. The early work focused on Galerkin 's method and various attempts to improve its stability while retaining its basic character. In the late 1970s a new approach was introduced, namely, "stabili zed methods," such as SUPG and Galerkin/least-s quares. These methods have been applied to many areas in fluid ...

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