Results 241 to 250 of about 14,174 (274)
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THE CHROMOSOMES OF PACHYPHYTUM (CRASSULACEAE)
American Journal of Botany, 1973Eleven of the 12 species of Pachyphytum, all that are available, have n = 31–33 standard chromosomes, or a multiple. Accessory chromosomes were found in some or all collections of four species; some cells of one plant have more than 50 of them. Accessory chromosomes often occur in groups at metaphase I, corresponding to their origin from one to several
Charles H. Uhl +3 more
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Umbilicus, a New Record for Angola in the Crassulaceae
Haseltonia. Yearbook of the Cactus and Succulent Society of America, 2022: A new record of Crassulaceae, namely plants that may belong to Umbilicus botryoides Hochst. ex A.Rich., is documented for the Angolan Flora. These plants were observed on the western edge of the Huila plateau near the town of Lubango.
P. Bruyns, C. Klak
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Distribution of alkaloids and tannins in the Crassulaceae
Biochemical Systematics and Ecology, 1995Alkaloid and tannin levels of 36 species of the Crassulaceae were compared. The taxa investigated were Crassula multicava, Echeveria venezuelensis, Pachyphytum compactum, Kalanchoe (two sop.), Bryophyllum daigremontianum, Sedum (23 spp.), Aeonium (four spp.) and Sempervivum (three spp.). Apart from the alkaloidal species of Sedum, only E. venezuelensis
Henk 't Hart +6 more
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Sinocrassula jiaozishanensis (Crassulaceae), a new species from Yunnan Province, China
Phytotaxa, 2022Sinocrassula jiaozishanensis, a new species from China, is described and illustrated. Molecular analysis and morphological comparisons were carried out.
Jia-Guan Wang +3 more
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THE CHROMOSOMES OF THE SEMPERVIVOIDEAE (CRASSULACEAE)
American Journal of Botany, 1961Uhl, Charles H. (Cornell U., Ithaca, New York.) Chromosomes of the Sempervivoideae (Crassulaceae). Amer. Jour. Bot. 48(2): 114–123. Illus. 1961.—Chromosome numbers are reported for 207 collections representing 68 of the ca. 95 species in this subfamily.
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Ornamentation of the testa inSedum (Crassulaceae)
Plant Systematics and Evolution, 1980A SEM investigation of the seeds of 40 European and 5 Asiatic species ofSedum revealed three fundamentally different types of ornamentation of the testa. The most prominent difference in the ontogeny of the seeds differing in ornamentation is the ovular envelope, which is a mucous membrane enclosing the ovules and young seeds and occurring only in ...
H. 't Hart, W. Berendsen
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The adventive species of Crassulaceae
Russian Journal of Biological Invasions, 2011The results of analysis of adventive species of the Crassulaceae family from different regions of the Earth are presented. The highest number of alien and naturalized species of Crassulaceae is found in Australia (approximately 50 species). Most of these species grow in New Zealand, North America, and Europe.
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Chromosomes of Villadia and Altamiranoa (Crassulaceae)
American Journal of Botany, 1999Villadia, ranging from Texas to Peru with some 25 species, has a rather distinctive thyrsoid to spicate inflorescence, and we keep it as a genus separate from Sedum. Twenty species show every gametic chromosome number from 9 to 17 and also 20–22 and higher.
Charles H. Uhl, Reid Moran
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The Crassulaceae of Cusco Peru
Cactus and Succulent Journal, 2017Abstract. In this second part, two taxa, one Sedum and one Villadia species (Crassulaceae) were found around the Sacred Valley in the Department of Cusco, Peru. (7) Sedum berillonanum from Ayacucho is reported for the first time in the Department of Cusco. Some slight differences in leaf shape are pointed out.
Guillermo Pino +3 more
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CHROMOSOMES OF GRAPTOPETALUM AND THOMPSONELLA (CRASSULACEAE)
American Journal of Botany, 1970Chromosome numbers are reported for probably all 11 species of Graptopetalum (x = 30–35) and for both species of Thompsonella (x = 26). Plants of two species of Graptopetalum have gametic numbers from about 240–275, more than have been reported in any other seed plants.
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