40 



Dansk Botanisk Arkiv, Bd. 2. Nr. 8. 



1. Stem and branches ascending from a decumbent (sometimes 

 rooting?) base; carpels with recurved beak C. intricata. 



2. Stem straight, erect; carpels with nearly straight beak. 



C. eolorata. 



B. Flowers axillary, solitary or few together, 4-merous; seeds 1 — several in 

 each carpel. 



a. Flowers few together at the uppermost part of the plant; 1 seed in 

 each carpel. Water-plant C. natans. 



b. Flowers solitary in the axils. 



1. Leaves 0.5—1.0 cm long; 2 (3) seeds in each carpel. Pedicels 

 shorter than the leaves C. r e c u r v a. 



2. Leaves not reaching 0.5 cm; several seeds in each carpel. Pedi- 

 cels much longer than the leaves ... C. bonariensis. 



C. Flowers in rich dichotomous panicles, 4-merous; several seeds in each 

 carpel C. macrantha. 



D. Flowers subumbellate at the top of the plant. 3— 4-merous ; several 

 seeds in each carpel C. pedieellosa. 



1. Group: Helophythum Schönl. 

 1. Crassula natans Thunb., Prodr. Fl. Cap. (1794) 54; Schön- 

 land in Ann. Bolus Herb. II. 2, 1916 (1917) 47 (ubi synon.); 



Diels et Pritzel, in Botan. Jahrb. 35 

 (1904) 210. 



Armadale, on damp soil (dried- 

 up ditches) along the railway, in 

 flower and with ripe fruits (No. 361, 

 20. Sept. 1914). 



This inconspicuous species was 

 first found in W. A. by Diels and 

 Pritzel at Newcastle, distr. Avon; 

 the specimens were floating in a pond. 

 Our specimens grew in dried-up dit- 

 ches and were small and slender; 

 they agree well with the f. filiformis 

 (Helophytum filiforme Eckion et Zeyher 

 no. 1844, 289) as defined by Schön- 

 land (I. c, 49). 



Geogr. area: South Africa. 



Fig. 10. Sepals, petals, and 

 carpels with nectary scales (10 

 times enlarged), and nectary 

 scales isolated (20 times en- 

 larged) of Crassula species. 



a, C. pedieellosa (F. v. Müll.); 



b, C. macrantha (Hook, f.) Diels 

 et Pritzel ; c, C. Miriamæ Ostf. ; 



d, C. eolorata (Nees). 



2. Group: Vaillantii Schönl. 



2. Crassula macrantha (Hook, f.) 

 Diels et Pritzel, in Botan. Jahrb. 35 

 (1904) 210; Tillæa macrantha Hook, 

 f. in Hook. Icon, plant, t. 310 (1841); 



