Tab. 8650. 

 ARISTOLOCHIA Lawrenceae. 



Argentine. 



Aristolochiaceae . 

 Aristolochia, Linn. ; Benth. et Hook. f. Gen. Plant, vol. iii. p. 123. 



Aristolochia Lawreneeae, N. E. Br. ; species nova ab omnibus sectionis 

 Unilabiatarum floribus magnis limbo oblique oblongo vel elongato-ovato- 

 oblongo distinctissima. 



Suffrutex volubilis ; caulis glaber. Folia petiolata, stipulata, glabra ; lamina 

 8-11 cm. longa, 9-12 cm. lata, late et profunde cordata, apice subacuta 

 vel obtuse rotundata, lobis basalibus late rotundatis, supra viridis, subtus 

 glauco-virens ; petiolus 5-6 cm. longus ; stipulae 1-2 cm. longae, 1-5-2 cm. 

 latae, sessiles, orbiculatae, basi cordatae, glabrae. Flores solitarii ; 

 pendunculi axillares, ovariis inclusis 12-14 cm. longi, ebracteati, glabri. 

 Perianthium magnum, unilabiatum, luteo-album, pulchre brunneo- 

 purpureo-venosum, glabrum ; tubus supra basin inflatam subito refractus, 

 parte inflata 5 cm. longa, 3 cm. diametro, intus prope apicem pubescente, 

 parte superiore aequilonga subinfundibuliformi ; limbus sessilis, 10-12 cm. 

 longus, basi 7-8 cm. latus, erectus, oblique oblongus vel elongato-ovato- 

 oblongus, apice obtusissime rotundatus. Columna subsessilis, leviter 

 obconica, apice 6-loba ; lobi 3 mm. longi, lanceolati, erecti, apice incurvi, 

 obtusi. Antherae 6, lineares, apice basin loborum columnae attingentes. 

 Capsula 10-11 cm. longa, 3 ' 5-4 cm. diametro, oblonga, costato-hexagona, 

 basi debiscens. Semina 1'5 cm. longa, 13 cm. lata, plana, cuneato- 

 obovata, subpapyracea, supra levia, subtus area centrali minute verruculosa. 

 — N. E. Brown. 



The striking Aristolochia which is the subject of our 

 illustration was introduced to cultivation by the late 

 Sir Trevor Lawrence by means of seed obtained from 

 the Argentine, and was raised in his collection at Burford, 

 Dorking, in 1912. The seed was sown in October of that 

 year, and the material for our plate was supplied by 

 Lady Lawrence, to whom the species is dedicated, from 

 one of the original plants which flowered at Burford for 

 the first time in June, 1914. Along with the flowering 

 specimen was communicated part of the seed-pod with 

 seed of the species, representations of which also appear 

 in our figure. The character of the flower shows that 

 A. Lawreneeae is a member of the group Unilabiatae, but 

 within that group it stands apart ; no other species has a 

 limb bearing any close resemblance to the very oblique, 

 oblong, untailed one of this plant. In habit this is a 



March, 1916. 



