By A. C. Zeven, J. M. J. De Wet

ISBN-10: 9022007855

ISBN-13: 9789022007853

Scanned book

Origins of agriculture and domestication of crops; Cardles of agriculture and areas of variety: Chinese-Japanese zone; Indochinese-Indonedian quarter; Australian; Hindustani; significant Asian; close to Easter; Mediterranean sector; African; European-Siberian; South American quarter; significant American and Mexico; North American; Species with no an pointed out quarter.

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T Thallus (pl. thalli) the body of a lichen. U Umbilicus (adjective, umbilicate) A restricted attachment point, often at the center of a thallus, anchoring it to the substrate. Page 45 Index SPECIES PLATE A Acarospora chlorophana 1 Alectoria chalybeiformis 21 Aspicilia caesiocinerea 52 B Bryoria chalybeiformis 21 C Caloplaca trachyphylla 11 Candelariella rosulans 2 Cetraria aculeata 22 Cetraria cucullata 4 Cetraria islandica 16 Cetraria nivalis 5 Cetraria pinastri 45 Cetraria tilesii 6 Cladonia cariosa 24 Cladonia cervicornis var.

The edges of the lobes are usually blue-black, and the apothecia are brown, with a rim the same color as the thallus (we say the rim is thalline or lecanorine). It is abundant on sandstones. 32. Lecanora muralis [of walls]. This Lecanora forms very neat little round thalli, much smaller than those of L. garovaglii and with the marginal lobes quite flat instead of rounded. The apothecia are tan to brownish. Common on sandstone. Page 18 33. Lecanora novomexicana [of New Mexico]. This Lecanora has a thick, shiny green thallus with short, convex marginal lobes.

Ascospore A spore produced by the apothecium of a lichen; these spores are produced initially by meiosis, in eights or multiples of eight, sometimes reduced to as few as two or one. Ascus (pl. asci) A balloonlike cell which generates ascospores internally. C Cephalodium (pl. cephalodia) A separate colony of algae different from the normal symbiont, growing on the surface of a lichen. Cortex A layer of tightly packed fungal tissue forming the upper or lower side of the thallus; sometimes the lower cortex is absent, exposing the medulla.

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Dictionary of Cultivated Plants and Their Regions of Diversity: Excluding Most Ornamentals, Forest Trees and Lower Plants by A. C. Zeven, J. M. J. De Wet


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