1961] 



BOTANY OF THE GUAYANA HIGHLANDS PART IV (2) 



55 



Odontonema venezuelense Leonard, sp. nov. Fig*. 40. 



Frutex vel herba suffrutescens usque ad 2.5 ni altam, caulibus subquadran- 

 gularibus, glabris vel sursum parce antrorse hirsutis, pilis 0.5-1 mm longis; 

 lamina foliorum oblongo-ovata, usque ad 33 cm longam, et 11 cm latam, breviter 

 acuminata (apice ipso subacuto vel obtuso), basi angusta, integra vel leviter 

 crenulata, firma, supra glabra, eystolithis minutis, usque ad 0.16 mm longos, 

 subtus glabra, costa et venis parce hirtellis pilis usque ad 0.8 mm longos patulis 

 vel ascendentibus exceptis, subtus costa et venis lateralibus (8-10 paribus) et 

 venulis crasse reticulatis prominentibus, supra obscure venosa, eystolithis nullis ; 

 petioli crassi, usque ad 2 cm longos, parce hirtelli; panicula terminalis, densa, 

 angusta, usque ad 14 cm longam et 3 cm latam, pedunculis 2 ad 2.5 cm longos 

 et rhachibus plus minusve hirtellis; bracteae subulatae, carinatae, 1 cm longae 

 vel minores, hirtellae; pedicelli 1 ad 2 mm longos, crassi, minute puberuli; 

 calycis segmenta triangularia, 2 mm longa, 1.5 mm lata, acuta, minute puberula ; 

 corolla rubra, e 2.5 ad 3 cm longam, parce et minute puberula, tubo basi 2.5 mm 

 lato, supra basim 1.5 mm lato, ad os 4 mm lato, labiis subaequalibus, 8-12 mm 

 longis, labio superiore bilobato, lobis ovatis, 4-5 mm longis, 3-4.5 mm latis, 

 apice rotundatis, labio inferiore ad basim trilobato, lobis oblongis, 2-4 mm latis 

 apice obtusis; stamina vix exserta filamentis complanatis, glabris antheris ob- 

 longis, usque ad 5 mm longas et 1 mm latas, lateribus adaxialibus puberulis; 

 staminoclia usque ad 5 mm longa, apice antheris inchoatis; capsulae clavatae, 

 glabra. 2.5 cm longae, 6 mm latae, stipitatae; semina plana, 5 mm longa, 4 mm 

 lata basi obliqua, alveolata, cana. 



VENEZUELA: Bolivar: Bio Parguaza, locally frequent along river at Raudal Maraca 

 (about 110 river km from mouth), alt. 115 m; shrub 1.5 m; flowers red; 31 Dee 1955, 

 J. J. Wurdaelc <$• J. Y. Monaehino, 41054 (type, US). Amazonas: Cano Guaviarito, Eio Mana- 

 piare, Rio Ventuari, in dry secondary woodland between Camp Verada and Camp Tigre, alt. 

 200-900 m; virgate subshrub or shrub to 2 m; flowers red; 5 Feb. 1951, Bassett Maguire) 

 Kathleen D. Phelps, Charles B. Hitchcock $ Gerald Budoicskij 31780 (paratype, NY). Cerro 

 Huachamacari, Rio Cunucunuma, rain forest between Culebra and Camp I, alt. 400 m; flowers 

 red; 21 Dec 1950, Bassett Maguire, B. 8. Cou'an # John J. WurdacTc 29972 (paratype, US); 

 Serrania Paru, Rio Paru, Cano Asisa, Rio Ventuari, in tree-fall clearing in slope forest, locally 

 frequent; alt. 800 m; woody herb, unbranched, 1-2.5 m; flowers red; 13 Feb 1951, R. S. 

 Cowan # John J. WurdacTc 31441 (paratype, US) ; 11 Feb 1949, Kathleen T). Phelps $ Charles 

 B. EitchcocTc s.n. (paratype, NY). 



Pseuderanthemum maguirei Leonard, sp. nov. Fig. 41. 



Frutex gracilis, caulibus subquadrangularibus, glabris; lamina foliorum 

 elliptica vel oblongo-obovata, usque ad 16 cm longam et 5 cm latam, graciliter 

 acuminata, basi angustata, aliquando firma, integra, utrinque glabra vel parce 

 et minute hirsuta, costa et venis (6-8 paribus) subtus aliquanto prominentibus, 

 supra obscuris, eystolithis nullis ; petioli graeiles glabri vel parce hirtelli ; racemi 

 terminales, usque ad 7 cm longos, rhache hirtella, pilis ascendentibus, albis, 

 usque at 0.6 mm longos ; bracteae rigidae, basi 1.25 mm latae, sursum subulatae, 

 subulata, basi 0.75 mm lata, hirtella, pilis eglandulosis, patulis vel ascendentibus, 

 usque ad 0.16 mm longos, pilis glandulosis, patulis, usque ad 0.66 mm longos; 

 corolla 15 mm longa, alba, lobo medio labii inferioris purpureo-maculato, tubo 

 1 cm longo, basi 1.25 mm lato glabro, sursum dense puberulo, pilis glandulosis 

 et eglandulosis intermixtis, ca. 0.03 mm longis, ad os 3 mm lato, labio superiore 

 bilobato, .lobis anguste ovatis, 4 mm longis, 2 mm latis, apice obtusis, labio 

 inferiore trilobato, lobis obovatis 4 mm longis, 2 mm latis, apice rotundatis, 



