Detailed morphological studies have been carried out on Lomentaria pinnata Segawa. This is the first report of male gametophytes and carposporophyte development for the species. The hollow thallus, spermatangia which are produced terminally on the mother cells, three-celled carpogonial branch, cystocarp protrudes on the thallus, tetrahedrally divided tetrasporangia, and tetrasporangia are formed in depressed sori, which satisfy the characteristics of the genus Lomentaria. While, the small cortical cells which form rosettelike appearance and the transverse septum occurs only at the base of the branches, which satisfy the characteristics of a separate genus Chondrothamnion. The breadth of thalli, branching times and presence of stoloniferous holdfast of L. pinnata are variable in their habitat. Comparisons of their type specimens confirm that L. okamurae is conspecific with L. pinnata.
Fine structure of Nitzschia amabilis Hide. Suzuki collected from the Suruga Bay deep seawater pumped from a depth of 397 m at Shizuoka Prefectural Research Institute of Fishery, Japan has been examined by light (LM) and electron microscopies (SEM and TEM). The following morphological features of the species are revealed through the present study; 1) two chloroplasts positioned in diagonally opposite, 2) the central nodule with a bunchy thickening externally, 3) the areola occluded by hymen with regularly scattered perforation, and 4) the girdle bands distinguishable into three types mainly on the basis of the structure of pars exterior.
Karoowia umezuana K. H. Moon & Kashiw. is described from Prov. Bungo (Oita Pref.), Kyushu, Japan. It is easily distinguished from allied species in having pustulate soredia and in producing usnic and fumarprotocetraric acids as major chemical substances.
As part of a series of studies on the typification of botanical names published by Tomitaro Makino, proposals for the lectotypification, neotypification and the verification of other type materials for taxa in the family Ranunculaceae are presented here
Two new species of Meconopsis (Papaveraceae), collected by Toshio Yoshida, from Mts. Biluo Xueshan in NW Yunnan along a narrow belt between two valleys Mekong (Lancang Jiang) and Salween (Nu Jiang), are described. Meconopsis bijiangensis is similar to M. racemosa Maxim., M. rudis (Prain) Prain and M. speciosa Prain, but apparently differs from them in having large, cylindrically ellipsoid capsules 2.5-3.8 cm long, with 3 or 4 grooves and dense spreading spine-like hairs the base of which is blackish and raised. Meconopsis castanea H. Ohba, T. Yoshida & Hang Sun resembles M. bijiangensis H. Ohba, T. Yoshida & Hang Sun and M. racemosa Maxim., but is distinguished from them by the maroon petals, the larger capsules, and the spine-like hairs without raised blackish base.
Lobathallia alphoplaca (Wahlenb.) Hafellner was first reported from Korea, where it grew on lava distributed in rather restricted coastal area at NE side of Cheju (Jeju) Island. It has been reported from China and Japan in Asia.
New combinations are made on the East Asian species of Crypsinus to Selliguea in accordance with a recent treatment of the Selliguea in Flora Malesiana. Selliguea echinospora, S.engleri, S. falcatopinnata, S. hastata and its var. longisquamata, S. quasidivaricata, S. rhynchophylla, S. taiwanensis, S. veitchii, S. yakuinsularis and S. yakushimensis are proposed.
Elymus humidus (Ohwi & Sakam.) Osada (Poaceae) is found in Tokushima Prefecture, Shikoku, Japan. Although this perennial grass was reported in the prefecture, the existence was not confirmed for a long time. Elymus humidus is very rare in Shikoku and is affraid to be extinct. Conservation for the species is extremely required.
Chromosome numbers were counted in root tip cells of 13 aquatic and wetland plants growing in acid sulfate soil in central Thailand. Results were as follows: Cyperus haspan, 2n = 26; Eleocharis dulcis, 2n = ca. 212; Fimbristylis alboviridis, 2n = 20; Pycreus polystachyos, 2n = 106 (Cyperaceae); Blyxa aubertii, 2n = 40 (Hydrocharitaceae); Digitaria ciliaris, 2n = 54; Imperata cylindrica, 2n = 20; Panicum repens, 2n = 45; Paspalum orbiculare, 2n = 40 (Poaceae); Cleome rutidosperma, 2n = 32 (Capparaceae); Ludwigia adscendens, 2n = 32; Ludwigia hyssopifolia, 2n = 16 (Onagraceae); Melochia corchorifolia, 2n = 36 (Sterculiaceae). Most chromosome numbers were confirmed in the previous reports, but they are reported here for the first time using plant materials from Thailand. The result of Fimbristylis alboviridis (2n = 20) is first report for the species.