32. 4. TYPHACEAE— 6. APONOGETONACEAE. 



WIDDRINGTONIA Endl. (Callitris Vent). 



draco-montana Stapf. (cupressoides Endl.) Common along 

 streams in Drakensberg. 



MONOCOTYLEDONEAE. 

 FAMILY 4— TYPHACEAE. 



Aquatic or marsh herbs with creeping rootstock and erect 

 simple stems. Leaves linear sheathing. Flowers unisexual, with- 

 out a perianth, but usually surrounded by hairs, arranged in 

 dense cylindrical inflorescences. Stamens 2 — 7. Ovary 1 celled. 

 Ovule 1 pendulous. Fruit dry. 1 genus 1 species. 

 TYPHA. Tourn. 



latifolia L. subsp. capensis Rohrb. Common in marshes 

 and along streams. Often mixed with sedges and 

 Phragmites. 



FAMILY 5— POTAMOGETONACEAE. 



Aquatic herbs. Leaves with axillary scales. Flowers uni- 

 sexual or hermaphrodite, regular. Perianth rudimentary or want- 

 ing. Stamens 1 — 4. Carpels several, rarely (Zostera) 1. Ovules 1 

 in each carpel. Fruit indehiscent. 3 genera 9 species. 



1. Stamens 4. Anthers with sepal-like appendages. 



1 POTAMOGETON. 

 Stamens 1. 2. 



2. Carpel 1. Submerged marine plant. 2 ZOSTERA. 

 Carpels usually 4. 3 ZANNICHELLIA. 



1. POTAMOGETON... Tourn. 



1. fluitans Roth, subsp americanus var thunbergii. 



2. crispus L. Coastbelt and Midlands. 



3. mucronatus Schrad. Coastbelt. 



4. javanicus Hassk. Midlands. 



5. lucens L. Coastbelt and Midlands. 



6. n a tans L. Coastbelt. 



7. pusillus L. Coastbelt. 



2. ZOSTERA L. 



nana Roth. Along seashore, usually near river mouths. 



3. ZANNICHELLIA Mich. 



palustris L. Coastbelt. 



FAMILY 6— APONOGETONACEAE. 



Aquatic herbs with tuberous rootstock and radical leaves. 

 Flowers*in 1— 4 spikes connected at base, rising above the water. 

 Perianth segments 1—3. Stamens 6 or more. Carpels 3—8 dis- 



