72 SOUTH NIGERIAN PLANTS 



when dry, somewhat paler and not at all shining on the underside ; 

 lateral pair of nerves arising from the midrib at from less than 1 cm. 

 to nearly 2 cm. from the base of the leaf, each nerve traversing about 

 one-half of the leaf in an arch of no great curvature which never 

 approaches the leaf-margin, and at length anastomoses with the 

 lowest of the three other lateral nerves ; the nerves are flat above and 

 prominent below; petioles about 12 mm. long, channelled above, 

 stout. Tendril-hearing hra^ich 9 cm. long, with two pairs of tendrils 

 6 cm. apart; tendrils woody, 4 '5-6 cm. long, much curved and 

 swollen in the upper part. Cymes + 6 cm. long, 3-4 cm. in diameter. 

 Peduncles 2 cm. long ; central flower of each cymule usually sessile 

 or subsessile, lateral flowers on pedicels up to 8 mm. in length. 

 Bracts 1 " 5-2 mm. long. Calyx 2 " 5 unii. long. Corolla palest yellow, 

 tube quite glabrous inside, 5 mm. long, 3-3 "5 mm. broad; lobes 

 6 mm. long, like the tube somewhat fleshy. " Corona^ " 2 ' 5 mm. long, 

 its lobes about "5 mm. long. Filaments 1 mm., anthers 2 mm. long. 

 Ovary 3 mm. long, style 4 mm. 



The genus has all the characters of Stryclnios, with the addition 

 of the so-called " corona." 



CONVOLVULACE^ by Dr. A. B. Rendle. 



The collection includes thirty-four species, sixteen of which 

 belong to the genus I^wmoea. The majority are more or less 

 widely spread in Tropical Africa or tropical countries genei-ally. 

 Eight are restricted to West Tropical Africa, including Lejn- 

 stemon i)arviflorus Pilger and Ipomoea Hierniana Rendle, previously 

 known only from the Cameroons, I. veJutipes Welw. from S. 

 Cameroons and Angola, and I. rnicrantha Hallier f. from the 

 Cameroons and Ashanti. 



Frevostea nigerica Rendle sp. nov. Planta scandens caule 

 tenui ; foliis . . . ; Jioribus apice et sub apice pedunculorum 

 axillarium aggregatis ; bract eis minutis lineari-oblongis vel 

 -oblanceolatis dorso ferrugine hirsutulis ; seiHills 2 exterioribus 

 ovato-cordatis obtusis veluti pedicello tenui dorso praecipue 

 superne ferrugine hirsutulis, sepalis interioribus parvis late ovatis 

 acutis ; corolla urceolata alba parva segmentis brevibus rotundatis 

 demum recurvis sub ore ferrugine pubescente ; antheris ante 

 anthesin reversis ; stylo paene ad basin diviso, bi^achiis inaequali- 

 bus stigmatibus late ellipsoideis ; fructu indehiscente ovoideo styli 

 basi persistente coronato monospermo, sepalis accrescentibus 

 rotunde ovatis vel suborbicularibus cordatis. 



Oban ; n. 1484. 



Said to be leafless in the flowering and friiiting stage. Peduncles 

 apparently short, stiff, bearing a large number of crowded flowers ; 

 pedicels 6-7 mm. long. Outer sepals 5-8 mm. long, the outermost in 

 the fruiting stage to 4*5 cm. long and as broad, the inner about 

 2 ■ 5 cm. Corolla 1 • 4 cm. long by 8 mm. in diameter ; segments 1 mm. 

 long. Fruit (unripe) about 1 cm. long without the beak. 



