Plants Collected in the Percy Sladen Memorial Expeditions. 259 



2. A. detinens, Burch., Trav., i., 310. 



Great Namaqualand : Sandy plains 25 km. North of Warmbad, 

 4299. 



3. A. glandulifera, Schinz, in Mem. Herb. Boiss., i., 114. 



Great Namaqualand : Sandy flat South of Lowen's River, 

 Gawachab, 4081. 



4. A. giraffae, Willd., Enum. Hort. Berol., 1054. 

 Bushmanland : Bella, 3584, 2951. 



5. A. horrida, Willd., Sp. PL, iv., 1082. 

 Namaqualand : Two miles South of Tweefontein, 3456. 



ACANTHACEAE. 



By Louisa Bolus. 



1. RUELLIA. 



1. B. Marlothii, Engl., Bot. Jahrb., x., 257. 



Damaraland : Welwitsch, 4420. Deep ravines near Welwitsch, 

 4148. 



2. PETALIDIUM. 



1. P. linifolium, Harv., in Thes. Cap., ii., 27, t. 143. 



Great Namaqualand : Near stream-bed on stony plains, 12 km. 

 West of Sandverhaar, 4624. 



2. P. ovatum, C. B. CI., in Dyer, El. Trop. Afr., v., 90. 

 Damaraland : Dry stream-courses at Welwitsch, 4151. 



3. P. Gossweileri, S. Moore, in Journ. Bot., 1902, 307. 

 Bushmanland : Pella, 3548. 



3. BLEPHARIS. 



1. B. furcata, Pers., in Syn., ii., 180. 



Namaqualand : Dry river-bed at foot of Jackal's Berg, 6162. 

 On quartzite slopes above Brakwater pool, 6074. Quartzite on 

 plateau above Modderfontein Pass, 5998. Dry sandy places in 

 South side of pass between Daunabis and Bethany Drift, 6032. 



