R pa

i Iii

ft mu afe iM

IM0I mm tMlljWin

250 Mm

Fig. 1. Diffuse-porous xylem with growth zones. Vessels are arranged in long, loose radial multiples. Stem of a 1 m-high shrub, Savannah, arid zone, Saudi Arabia. Cadaba longifolia, transverse section.

Fig. 2. Diffuse-porous xylem with growth zones. Vessels are arranged in long straight radial multiples. Stem of a 1 m-high shrub, desert, arid zone, Twentynine Palms, California, USA. Cleome isomeris, transverse section.

unlignified fibers

Left Fig. 4. Vessels with simple perforations and small intervessel pits. Stem of a 1 m-high shrub, succulent zone, subtropical climate, Gran Canaria, Canary Islands. Cleome brachyphylla, radial section.

Right Fig. 5. Vessels with very thick, ligni-fied walls. Stem of a 1 m-high shrub, desert, arid zone, Saudi Arabia. Cadaba rotundifo-lia, transverse section.

Fig. 3. Ring-porous to semi-ring-porous xylem. Vessels are arranged solitary or in irregular radial multiples. Stem of a 1-2 m-high shrub with long, liana-like twigs, on rock, Mediterranean zone, Catalonia, Spain. Capparis spinosa, transverse section.

Fig. 2. Diffuse-porous xylem with growth zones. Vessels are arranged in long straight radial multiples. Stem of a 1 m-high shrub, desert, arid zone, Twentynine Palms, California, USA. Cleome isomeris, transverse section.

unlignified fibers

Fig. 3. Ring-porous to semi-ring-porous xylem. Vessels are arranged solitary or in irregular radial multiples. Stem of a 1-2 m-high shrub with long, liana-like twigs, on rock, Mediterranean zone, Catalonia, Spain. Capparis spinosa, transverse section.

Left Fig. 4. Vessels with simple perforations and small intervessel pits. Stem of a 1 m-high shrub, succulent zone, subtropical climate, Gran Canaria, Canary Islands. Cleome brachyphylla, radial section.

Right Fig. 5. Vessels with very thick, ligni-fied walls. Stem of a 1 m-high shrub, desert, arid zone, Saudi Arabia. Cadaba rotundifo-lia, transverse section.

250 Mm p

Fig. 6. Paratracheal parenchyma. Stem of a 1 m-high shrub, desert, arid zone, Twenty-nine Palms, California, USA. Cleome isom-eris, transverse section.

Fig. 7. Paratracheal parenchyma. Rays are unlignified. Stem of a 2 m-high shrub, desert, arid zone, Fezzan, Libya. Maerua cras-sifolia, transverse section.

Fig. 8. Uniseriate homocellular rays. Stem of a 5 m-high tree, Savannah, arid zone, Sudan. Boscia arabica, tangential section.

Fig. 7. Paratracheal parenchyma. Rays are unlignified. Stem of a 2 m-high shrub, desert, arid zone, Fezzan, Libya. Maerua cras-sifolia, transverse section.

Left Fig. 9. Uni- and biseriate rays. Root collar of a 0.5 m-high hemicryptophyte, ruderal site, arid zone, Fezzan, Libya. Cleome arabica, tangential section.

Right Fig. 10. 2-3 seriate rays. Stem of a 1-2 m-high shrub with long, liana-like twigs, on rock, Mediterranean zone, Catalonia, Spain. Capparis spinosa, tangential section.

Left Fig. 11. 3-6 seriate rays with sheet cells, in a plant with a bent stem. Stem of a 1 m-high shrub, succulent zone, subtropical climate, Gran Canaria, Canary Islands. Cleome brachyphylla, tangential section.

Right Fig. 12. Included phloem consisting of a tangential band of thin-walled parenchyma, of thick-walled fibers and collapsed sieve tubes. Stem of a 1 m-high shrub, desert, arid zone, Saudi Arabia. Cadaba rotun-difolia, transverse section.

,cry

Left Fig. 13. Included phloem consisting of two marginal, tangential bands of collapsed sieve tubes and groups of irregularly-formed lignified parenchyma cells or/ and sclerenchyma in the center. Stem of a 1 m-high shrub, succulent zone, subtropical climate, Gran Canaria, Canary Islands. Cleome brachyphylla, transverse section.

Right Fig. 14. Large prismatic crystals in ray cells. Stem of a 2 m-high shrub, desert, arid zone, Fezzan, Libya. Maerua crassifolia, radial section.

Was this article helpful?

0 0
Building Your Own Greenhouse

Building Your Own Greenhouse

You Might Just End Up Spending More Time In Planning Your Greenhouse Than Your Home Don’t Blame Us If Your Wife Gets Mad. Don't Be A Conventional Greenhouse Dreamer! Come Out Of The Mould, Build Your Own And Let Your Greenhouse Give A Better Yield Than Any Other In Town! Discover How You Can Start Your Own Greenhouse With Healthier Plants… Anytime Of The Year!

Get My Free Ebook


Post a comment