1961] 



BOTANY OF THE GUAYANA HIGHLANDS PART IV (2) 



53 



Fig. 38. Justicia plectica Leonard (Maguire, Wurdack 4' Bunting 36165). a, node and 

 leaf, X 0-5 ; b, section of stem enlarged to show cystoliths and hairs, X 2.5 ; c, portion of 

 leaf blade (lower surface) enlarged to show cystoliths and hairs, X 3.5; d, gland-tipped 

 hairs of ventral surface of petiole, X 38; e, inflorescence, X 0-5; f, bract, X 1.5; g, bract, 

 bracelets, and calyx, X 1.5; h, portion of calyx segment, X 6; i, tip of same, X 6; j, tip 

 of corolla, X 1.5; k, tip of stamen to show anther, X —5; 1, capsule valve, X 1.5; m, 

 portion of valve enlarged to show pubescence, X 2 ; n, retinaculum, X 2.5 ; o, seed, X 5. 



Justicia plectica is related to Justicia albomarginata (Lindau) Leonard 

 {B eloper one albomarginata Lindau, Bull. Herb. Boiss. ser. 2. 5:373. 1905. Hassler 

 2755, Paraguay). The white-margined calyx segments, the capsules and globular 

 seeds of the two species seem to be very similar. The corollas of J. albomarginata 

 are however purple instead of orange and much smaller, 32 mm long, the 

 upper lip 14 mm long and the lower 17 mm long. The specific epithet is derived 

 from the Greek word TrXexTixos, meaning tangled and alluding to the tangles 

 formed by the species. 



Justicia wurdackii Leonard, sp. nov. Fig. 39. 



Herba 1-2 m alta, ramosa, caulibus subquadrangularibus, glabris, cystolithis 

 minutis, subpunctiformibus ; lamina foliorum magna, usque ad 30 cm longam et 12 

 cm latam, breviter acuminata, basi obtusa vel rotundata, in petiolum decurrens, 

 aliquanto firma, integra, glabra vel parce et minute ciliata, costa et venis 

 lateralibus (12-14 paribus) subtus prominentibus, supra obscuris, cystolithis 

 minutis, inconspicuis, e 0.1 ad 0.16 mm. longos ; petioli usque ad 9 cm longos, 

 glabri vel marginibus alarum parce et minute hirtelli; paniculae terminales, 

 aliquanto laxae, usque ad 18 cm longas, basi 3-4 cm latae, apice acutae vel sub- 

 obtusae, floribus secundis, pedunculo 8 cm longo, glabro, internodiis panicularum 

 puberulis, pilis 0.1-0.3 mm, longis; bracteae subulatae, illae ramos infimos pani- 

 cularum subtendentes usque ad 2.5 cm longas et 1.5 mm latas, aliae minores; 



