﻿Tournefortia.'\ boragine^ (Wright). 7 



River and Uilvlugfc, 3000-4000 ft., Brege, 7836b ! Var, /3. Graaff Reinet Dlv.j 

 banks of the Broederstroom, near Graaff Reinet72600 ft., Bolus, 728 ! 

 Westebn Rkgion : Gi-eat Nainaqualand; Aus, Sehinz, 828 .' 

 Kalahari Region: Griqualand West j around Kunberley, 40O0 {t., Bolus in 

 Herb. Norm. Austr. Afr., 330 ! 



Also in Tropical South-west Africa. 



IV. HELIOTROPIUM, Linn. 



CaJyx more or less deeply 5-lobed ; lobes linear or lanceolate. 

 Corolla : tube cylindrical, naked at the throat ; lobes 5, imbricate or 

 induplicate, sometimes wide and plicate or undulate, sometimes 

 ending in a narrow inflexed point, patent at time of Howering. 

 Stamens 5, fixed in the corolla-tube, included ; filaments very short ; 

 anthers ovate, oblong or lanceolate, obtuse, mucronate or shortly 

 appendaged at the apex. Ovary 4-lobed and 4-celled, or 2-celled 

 with each cell again almost divided into 2 ; style terminal, very 

 short, or moderately long, with a depressed conic or broad stigmatic 

 ring below the apex ; ovule pendulous from the inner angle of the 

 cell near its apex. Fruit somewhat fleshy, 2- or 4-snlcate or -lobed, 

 at length dividing into 4 distinct or geminately cohering nutlets. 

 Seeds straight or curved ; albumen usually scanty ; cotyledons 

 plano-convex ; radicle short. 



Herbs or uuderslirubs, rarely shrubs, villous or scabrid, rarely quite glabrous; 

 leaves alternate, rarely sabopposite ; flowers usually small, sometimes along the 

 branches of forked scorpioid cynics, sometimes axillary or in simple iealy 

 racemes. 



DisTEiB. Species about 150, throughout the tropical and temperate regions of 

 the woild. 



Corolla-tube short : 



Leaves linear, glabrous ... ...' ... ... (1) currassavicum. 



Leaves oval, liairy : 



Lateral nerves not impressed above ... ... (2) ovalifolium. 



Lateral nerves conspicuously impressed above (3) supinum. 

 CoroJla-tube long : 



Calyx as long as the corolla-tube (4) tubulosum. 



Calyx mucb shorter than the toroUa-tube : 



Leaves oblong-lanceolate (5) Nelsoni. 



Leaves linear (6) lineare. 



P 1. H. currassavicum (Linn. Sp. PI. ed. i.l30) ; rootstock woody; 

 stem woody; branched from the base, up to 10 in. high, glabrous; 

 leaves oblong, obtuse, tapering downwards into a short petiole, up to 

 1 in. by 3 lin., glabrous, slightly verrucose ; cymes often branched, 

 up to li in, long ; peduncle up to 9 lin. long ; calyx quite glabrous, 

 irregular ; lobes linear or triangular, obtuse ; corolla slightly exserted 

 from the calyx ; lobes ovate-triangular, one much larger than the 

 rest ; stamens inserted about the middle of tlie corolla-tube ; anthers 

 ovoid, acute ; nutlets with two small flat and one very large convex 

 side, slightly rugose on the back, Brege, Zwei PjlanzeAigeogr. 

 Documente, 63, 1;^,0; DC. Prod. ix. 538. 



Var. )3, virens (DC. Prod. ix. 538); more robust than the type; leaves up to 

 1^ in. by 4 Ua. B. virens, E. Meyer ex DC. Frod. ix. 538. 



