Fig. 67 b. JViddringtonia cupressoides (L.) End]. On eastern slope of Table Mountain. 

 900 feet. In the foreground Fagrlia bituminosa and Helichrysum corymbosum \ on the 



ri^ht above the rock Hennas villosa. 



Plate 



20. 



JVrlwitschia Bainesii (Hook, fil.) Carriere. 



1. $ flower ready for pollination. Long, section. 10/1. b. Hract (scale of cone), 

 face view. n. Nucellus. /'. Integument. ;//./. Micropylar tube. 



2. Long, section through lower part of micropylar tube and top of nucellar cone, 

 showing numerous pollen grains and pollen tubes. n. Nucellus. /';//. Integument. 



p.g. Pollen grain. 

 i'.c. Generative eel 



p.t. Pollen tubes. 



Vegetative nucleus. 

 Exine. in. 



I 1 1 T 111*. 



ep, Inner layer of integument. 



3. Pollen grain. 540/1. 



4. Pollen grain in an early stage of germination. 700/1. ex. 

 g.c. Generative cell. /.//. Tube nucleus. 



5. Part of pollen tube, showing elongated generative cell [g.c). 1 250/1. 



6. A macrospore in long, section. 700/1. n.m. Wall of macrospore. 



7. Macrospore nucleus in mitosis, showing 25 chromosomes. n. Nucellus. 

 v. Polar vacuoles, m.w. Wall of macrospore. 700/1. 



8. A 3-celled proembryo. 305/1. 9. Seed, enclosed in winged perianth. Nat. size. 



10. Seed, without the perianth, in Jong, section, cut parallel to the wing, showing 

 large endosperm and cylindrical embryo. 2/1. 



11. Seed, long, section, at right angles to section of Fig. 10. 



12. Embryo with spiral suspender. 3/1. 13. Seedling, after Bower. r. Root. 



14. A later stage of seedling, c. Cotyledons. /. Leaves. 



15. Young plant, two years old, raised in the Botanic Gardens at Darmstadt. 



16. Section through portion of leaf. 150/1. at. Cuticle. /•/>. Epidermis. 

 ha. Bast fibres, spi. Spicular cell, a fragment, s. Stoma, ai. Air chamber, pa. Green 

 parenchyma. 



17. Spicular cells, from leaf, impregnated with crystals of oxalate of lime. 40/1. 

 Figs. 1 and 12 after Strasburger, Fig. 3 from Wcttstein, Handbuch, Figs. 2, 4-8 



after Pearson. The others from nature. 



