244 Transactions of the South African Philosophical Society. 



10. 0. denticulata Wolley-Dod. Marshy ground, frequent ; 5-8. 



11. 0. variabilis Lindl. Flats and slopes to 1,000 feet, very 

 common ; 4-8. Flowers usually white or deep rose, rarely pink. 

 This species has been unaccountably much confounded with 

 0. purpurea, from which it differs constantly in its much more 

 conical corolla tube, and the absence of translucent dots under the 

 leaves, their place being taken (at least in most examples) by short 

 black lines. 



12. 0. convexula Jacq. Flats to mountains, common ; 3-8. 

 One of the earliest to flower, and reaching the highest elevation 

 (summit of Devil's Peak). We include 0. commutata Sond. under 

 this species, his type specimens are almost certainly not distinct, 

 and Jacquin's name has priority. We have never seen specimens 

 with the cellular face of the leaf uppermost, and think this supposed 

 character due to an error in observation. 



13. 0. punctata Linn. Bushy flats and hill slopes up to 

 1,500 feet, frequent ; 4-6. 



14. 0. balsamifera E. Mey. Sandy flats, rare ; 6-7. North- 

 west of Maitland. This species comes very near 0. luteola, which 

 has an equally sticky, but a smaller much narrower corm, its 

 flowers also are brighter clearer yellow, on longer peduncles, and its 

 calyx segments more obtuse. 



15. 0. luteola Jacq. Dry sandy places on flats, one of the 

 commonest species ; 5-8. A large-flowered form, probably var. 

 marginata Sond., must not be confounded with the next species. 



16. 0. Eckloniana Presl. Sandy and gravelly flats, rare ; 5-7. 

 Green Point Common. 



17. 0. obtusa Jacq. Flats and hill slopes to 1,500 feet, common ; 

 7-10. One of the latest to appear. Flowers very variable in colour, 

 brick-red, salmon-pink, pale yellow, or nearly white. 



18. 0. lanata Linn. f. Clay soil on hill slopes, not seen on flats, 

 common ; 5-9. A pink-flowered form exists and is common behind 

 Wynberg Camp. 



19. 0. natans Linn. f. Vleys and pools on flats, frequent ; 8-11. 



20. 0. incarnata Linn. Woods and shady places, rather locally 

 common ; 8-12. East slopes Devil's Peak and Table Mountain up 

 to 1,500 feet. Though usually the latest to flower, it has been found 

 in April. 



21. 0. bifida Thunb. Hill and mountain slopes, especially in 

 open woods, frequent ; 3-7. Eeaches 2,000 feet. 



22. 0. hirta Linn. Flats and hill slopes, common ; 5-8. 

 Occasionally with double flowers. 



23. 0. brevicaulis Sond. Gravelly lower slopes, locally 

 frequent ; 5-7. Green Point Common ; north and west slopes 

 Signal Hill and Lion's Head; Kamp's Bay; Twelve Apostles. 



[0. pentaphylla Sims. See remarks under 0. poly phy 11a Jacq.] 



