نشریه رستنیها
سال پانزدهم شماره 2 (پیاپی 47، پاییز و زمستان 1393)

Five taxa viz، Agaricus altipes، A. cupreobrunneus، A. placomyces، A. porphyrocephalus، and A. urinascens var. urinascens are reported as new records for Iran. Details of taxonomical important features are also presented herewith. New localities in the west and north-west of the country are reported as habitats of Agaricus species in Iran.

Numerical analysis of Saxifraga in Iran was carried out on the basis of morphological and chorological data. The cluster analysis confirmed that the genus in Iran includes two distinct groups: Group one consists of two subgroups، a) alpine Irano-Turanian endemic species (S. ramsarica، S. iranica، S. wendelboi، S. koelzii)، and b) Euxino-Hyrcanian species (S. paniculata subsp. Cartilaginea، S. kotschyi). Group two comprises S. cymbalaria، S. sibirica، S. tridactylites، and S. exarata subsp. moschata. The original distribution maps for all species are provided.

In this study، the palynology of 33 species of Silene belonging to 15 sections was investigated to examine the correspondence between palynology، morphological sections and phylogenetic trees. The pollen grains were prepared using the acetolysis method. Quantitative and qualitative micromorphological features of pollens were investigated using light microscopy and scanning electron microscopy. Differences in quantitative and qualitative pollen characters within sections were used to regroup species using a statistical hierarchical clustering method (average linkage). According to this classification، the species were divided into eight groups، some of which differed from morphological groupings، but had some similarities to previous phylogenetic studies.

This study was carried out to contribute to the knowledge of biodiversity of xylariaceous fungi from North of Iran. Plant materials with fruiting bodies of xylariaceous fungi were collected and examined. Eight species viz. Annulohypoxylon nitens، Biscogniauxia anceps، B. capnodes var. rumpens، B. mediterranea، B. plana، Hypoxylon flavoargillaceum، Jumillera cinerea، and Nemania illita were identified. All these except B. mediterranea are new to the Iranian mycobiota. A dichotomous identification key for all the xylariaceous fungi examined by the authors from North of Iran is presented.

In order to identify Daldinia species in Guilan province، several specimens were collected during 2011–13. A total of six taxa، including Daldinia caldariorum (on Morus alba); D. childiae (on Parrotia persica، Pterocarya fraxinifolia، Morus alba، Quercus sp.، Prunus sp.، Citrus sinensis، Gleditschia caspica، Buxus sempervirens، Carpinis betulus and Alnus subcordata); D. gelatinoides (on M. alba); D. cf. loculata (on fallen wood); D. pyrenaica (on B. sempervirens and Pt. fraxinifolia)، and D. vernicosa (on Ulmus sp.، Ficus sp.، and P. persica)، were identified. All identified species are new to the Iranian mycobiota.

In a taxonomic survey on Cladosporium species in Iran، 35 specimens were collected from different substrates of various localities in Guilan (N. Iran) during 2011–12. Seven species viz. C. cladosporioides s. str.، C. oxysporum، C. halotolerans، C. perangustum، C. pseudocladosporioides، C. sphaerospermum، and C. tenuissimum are identified and the latter five species are new records to Iran.

In this study، a taxonomic status of the genus Roemeria in Iran is reviewed. The study of morphological characters of collected and herbarium specimens led to the introducing of two new taxa، namely، R. hybrida subsp. maculata and R. refracta var. alba. In addition، five synonymies are made as following: R. refracta var. albomarginata and R. refracta subsp. occidentalis as synonymies of R. refracta var. refracta; R. hybrida subsp. dodecandra، R. latiloba، and R. hybrida var. hispidissima as synonymies of R. hybrida subsp. hybrida. The identification key and diagnosic characters of taxa and their geographical distribution are presented here.

The preliminary result of a survey conducted on Xylaria species in the North of Iran is presented. Based on morphological examination of fungal specimens collected from Guilan، Mazandaran and Golestan provinces، eight species including Xylaria arbuscula، X. cubensis، X. filiformis، X. hypoxylon، X. longipes، X. multiplex، X. pannosa، and X. polymorpha were identified. Among the identified species، X. hypoxylon، X. longipes، and X. polymorpha have been already reported from Iran and the rest are new to the Iranian mycobiota. An identification key with brief description of all species already reported from Iran is presented.

In summer 2013، phytobenthos and periphyton cyanobacterial samples were collected from Sirch hot springs which are located in 50 Km of southeast of Kerman city (Iran) with coordinates of 30° 09´ 44˝ N and 57° 35´ 50. 0˝ E (Fig. 1A). Aphanocapsa rivularis، A. delicatissima are new species for Iran flora. The species of Aphanocapsa genera which have been reported previously from Iran are: Aphanocapsa grevillei (Berkeley) Rabenhorst by Faghir & Shafii (2013)، Soltani et al. (2012); A. incerta (Lemmermann) G. Cronberg & Komárek by Ramezanpoor (2004); and A. crassa Ghose by Tahami (2013). The description of new recorded species are as follows: 1. Aphanocapsa delicatissima West، W. & West، G. S. (1912) On the periodicity of the phytoplankton of some British Lakes. Journal of the Linnean Society of London، Botany 40:395–432. Syn.: Microcystis pulverea f. delicatissima (West، W. & West، G. S.) Elenkin 1938، M. delicatissima (West، W. & West، G. S.) Starmach 1966. Description: Colonies are spherical or elliptical in shape of free floating blue-green small cells which distributed frequently with equal distances throughout of a colorless glaze. Cells are 1 µm in diameter (Fig. 1. B). 2. Aphanocapsa rivularis (Carmichael) Rabenhorst، L. (1865) Flora europaea algarum aquae dulcis et submarinae. Sectio II. Algas phycochromaceas complectens. Pp. 1–319، 71 figs. Lipsiae [Leipzig]: Apud Eduardum Kummerum. Syn.: Palmella rivularis Carmichael 1833، Aphanocapsa anodontae Hansgirg 1892، A. endolithica Ercegovic 1925، A. endolithica var. rivulorum Geitler 1928، Microcystis anodontae (Hansgirg) Elenkin 1938، M. calciphila Schwabe 1947، M. anodontae var. rivulorum (Geitler) Kann 1978. Description: Irregular form or spherical floating colonies of round bright blue green cells which are single or in pairs with distance located in a mucilaginous sheath. Each cell is about 7 µm in diameter (Fig. 1C).