﻿12 BOEAGiNEJS (Wright). [Trichodetfma. 



discoid base ; leaves opposite, ovate-oblong, acute, up to 2.} by 1 in., 

 bearing hairs like the stem, lower petioled, upper sessile ; panicle 

 many-flowered ; pedicels up to 6 lin. long, slender, covered (like the 

 outside of the calyx) with stiff white hairs 1 lin. long; calyx-lobes 

 lanceolate, erect, 3-4 lin. long at flowering time ; corolla scarcely 

 exserted from the calyx, blue, throat yellow with 5 purple spots ; 

 lobes rounded, produced into an apiculus f lin. long ; anthers lanceo- 

 late, awn nearly as long as the cells ; style filiform, glabrous ; 

 nutlets 4, ovoid, scabrid, rugulose on the ventral side, margin raised, 

 white and spiny. LeJim. PL Asper. 195 ; Roem. & Schult. Syst Teg. 

 iv. 69, 753; Drege, Zirei Pflanzengeogr. Bocumente, 93; A.DC. 

 in DC. Prod. x. 173 ; Drege in Linnaea, xx. 197. Borago africana, 

 Linn. 8p. PI. ed. 2, 197 ; Burnt. Prodr. 4 ; Thunh. Fl. Gap. ed. 

 Schult. 161. jB, verrucosa, Forsk. Fl. jEijijpt.-Arab. 41 ; Sab. Hort. 

 Pom. 2, t. 22. Borraginoides aculeata, Moeuch, Meth. 516. Pollichia 

 africana, Medik. Beobacht. 248. 



Central I'egion : Calvinia Div. ; by streams in the "Karroo below Bockland 

 (Bokkeveld) Thunherg. Ceres Div. ; at Yuk Kiver, near Yuk River Hoogte, 

 Burchell, 1264 ! 



Western Region : Little Namaqufiland ; between Kousies (Buffels) Eiver and 

 Silver Foiiteiu, 2000 f t , Drege! iietween Verleptpram and the mouth of the 

 Orange Hiver, under 1000 ft., JDrige I near Ookiep, 3200 ft,, Bolus, Herb. Nor^n. 

 Aust.-Ajr., ea ! 



Kalahari Eegion : Orange Eiver Colony ; near the Vaal River, 5000 ft., 

 Zeyher, 1239 ! 



Also in tropical Africa. 



VI. TYSONIA, Bolus. 



Calyx 5-partite, persistent but scarcely enlarging ; lobes lanceolate. 

 Corolla rotate ; tube with 5 erect exserted quadrate-oblong retuse 

 scales at its throat and about 10 small swellings at its very base ; 

 lobes 5, subpatent, as long as the tube. Stamens 5, exserted ; 

 filaments filiform above, larger and complanate at the base ; anthers 

 oblong, obtuse, versatile. Ovary seated on a thick semiglobose torus, 

 indistinctly 4-lobed at the apex, 4-eelled ; st^ le terminal, undivided, 

 filiform, about as long as the stamens ; stigma small, capitate ; ovule 

 fixed to the inner angle of the cell, horizontal. Nutlets 1-3, much 

 laterally compressed, one often larger and produced at its margin 

 into a wide wavy cartilaginous crenate wing, the others smaller and 

 more narrowly winged. Seed erect, exalbuiuinous, ovate, compressed ; 

 testa conspicuously veined; cotyledons cuneate-obovate, plano- 

 convex ; radicle very short. 



DiSTRiB. Species 1, endemic. 



1. T. africana (Bolus in Hook. Ic. PI. t. 1942) ; a large herb, 

 perennial ?, about 3 ft. high ;_ stem ertct, .^imple, smooth; lower 

 leaves ovate, acute, 8 by 6 in., with a petiole G in. long, upper lanceo- 

 late, acuminate, 3|^ by } in., sessile, all narrowed at the base and 

 minutely scabrid on both sides; nerves sunk above, prominent 

 beneath ; cymes many in a lax terminal panicle 18 in. long, 5-9 in. 



