Plants Collected in the Percy Sladen Memorial Expeditions. 181 



except on the young parts ; leaves erect or ascending, petiolate, the 

 lowest oblong-linear, the rest narrow-linear, acute or acuminate, 

 sometimes spirally twisted at the apex, gradually attenuated towards 

 the base into a petiole l - 5-6 cm. long, scabrid and crisped on the 

 margin, up to 20 cm. (usually 10-15 cm.) long, - 5-0'8 cm. wide ; 

 umbels sessile, or more often pedunculate, peduncles up to 2"1 cm- 

 long ; bracts linear- filiform, 0-2-0'4 cm. long; pedicels sparingly 

 pilose, 1-2-P8 cm. long ; calyx-segments oblong-lanceolate acute, 

 sparingly pilose without, - 4 cm. long; corolla-segments spreading 

 oblong lanceolate, the margins delicately revolute, 0*6 cm. long ; 

 coronal lobes spreading-incurved, springing from the base of the 

 staminal column and equalling it in length, flattened at the back, 

 ecarinate oblong, rounded and minutely bilobed at the apex ; 

 staminal column cylindrical, constricted in the middle, - 4 cm. long ; 

 anther-appendages ample rounded, inflexed over the concave style- 

 apex ; wings 0*2 cm. long ; pollinia obliquely and broadly obovate. 



Allied to X. carinatum, N. B. Br., but readily distinguished from 

 that species by its longer leaves with crisped margins, fewer flowered 

 umbels, coronal lobes dorsally flattened, and the staminal column 

 being twice the length. 



Plate IV., Fig. 1, sketch of portion of a branchlet, nat. size ; 2, 

 coronal lobes and gynostege ; 3, one of the coronal lobes ; 4, gynos- 

 tege ; 5, one of the stamens viewed from within, the anther appen- 

 dage tipped up ; 6, pollinarium ; 7, style-apex, viewed from above — 

 all the latter variously magnified. 



6. ASCLEPIAS. 



1. A. filiformis, Benth. and Hook, f., Gen. PL, ii., 753 and 754. 

 Great Namaqualand : Bocky places near stream-bed, a little South 



of Dabaigabis, 4409. Stony ridge about 8 miles South-west of 

 Bitterfontein, 3871. Damaraland : Welwitsch, 4156, 4155. 



2. A. fruticosa, Linn., Sp. PL, ed. 1, 216. 



Cape : Damp places, southern aspect above Pickenier's Pass, 5173. 



3. A. rotundifolia, Mill., Diet., ed. 8, No. 15. 



Cape : Foot of Oliphant's Biver Mts., near Warm Baths, 7293. 

 Namaqualand: In fissures in granite blocks South of the town, 

 Steinkop, 4711. Bock crevices at Koets, 5727. Bushmanland : 

 kopjes, Nieuwfontein, 3432. 



