Mm

Carlquist (2002) studied 3 genera (Azima, Salvadora and Do-bera). Descriptions of Salvadora persica and Dobera glabra are given by Jagiella and K├╝rschner 1987 and Fahn et al. 1986 described Salvadora persica. For further studies, see Gregory (1994). The present study confirms all results from earlier stud-

ivp cry

Left Fig. 1. Interxylary groups of phloem are surrounded by thin-walled parenchy-matic cells and conjunctive tissue. Shrub, sea coast, tropical climate, Dhofar, Oman.

Salvadora persica, transverse section.

Right Fig. 2. Between the storied paren-chymatic cells occur 2-4-seriate rays. Shrub, sea coast, tropical climate, Dhofar, Oman.

Salvadora persica, tangential section.

ivp cry

Left Fig. 3. Vessel with a simple perforation and small, alternating intervessel pits. Shrub, sea coast, tropical climate, Dhofar, Oman. Salvadora persica, radial section.

Right Fig. 4. Prismatic crystals in ray cells. Shrub, sea coast, tropical climate, Dhofar, Oman. Salvadora persica, radial section.

Present features in relation to the number of analyzed species

IAWA code frequency

Total number of species 1

2 growth rings absent 1

5 diffuse-porous 1

11 vessels predominantly in clusters 1

13 vessels with simple perforation plates 1

39.1 vessel cell-wall thickness >2 pm 1

41 earlywood vessels: tangential diameter 50-100 pm 1

50 <100 vessels per mm2 in earlywood 1 58 dark-staining substances in vessels and/or fibers

(gum, tannins) 1 61 fiber pits small and simple to minutely bordered

69 fibers thick-walled 1

70 fibers thin- to thick-walled 1 79 parenchyma paratracheal 1 97 ray width predominantly 1-3 cells 1 107 ray: heterocellular with 2-4 upright cell rows (radial section) 1 120 storied axial tissue (parenchyma, fibers, vessels, tangential section) 1

135 interxylary phloem present 1

136 prismatic crystals present 1 R4 sclereids in phloem and cortex 1 R16 phellem consists of regularly arranged rectangular cells,

Rosaceae type 1

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