BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 24. AFD. III. N:0 10. 29 



Prestonia R. Be. 



P. lanata Mull. Arg. — Mull. arg., l. c. pag. 164. 



Minas Greraes: inter ponte do Sapacahy et Retiro P^i 1868. 

 Regnell III: 1600. Florigera.); Säo Paiilo: Mogy Mirim (^^ 3 

 1874. MOSÉN 1461. Florigera.). 



Corolla lutea. 



P. sericocalyx Malme n. .sp. 



Frutex alte volubilis. Rami pilis sat brevibus, mollibus, 

 plerumque reflexis sat dense fnlvo-tomentosi. Folia inter- 

 nodiis vulgo breviora, (12 — )14 — 18( — 20) cm. longa, (6— )8— 10 

 ( — 11) cm. lata, breviter petiolata, petiolo dense et sat molliter 

 fulvo-piloso, circiter 5 mm. loiigo, obovata v. elliptica, basi 

 angusta obtusa v. subcordata, apice aenminata, supra sub- 

 viridia, sat parce pnbescentia (junioria subsericea), subtus 

 dense albido- v. fulvescenti-tomentosa, indumento in nervis 

 paullulo obscuriore, nervis secundariis subtus emersis, utroque 

 latere circiter 7, angulo 45 — 55 insidentibus, marginem ver- 

 sus arcuatis, nervis tertiariis manifeste junctis. Cymae densae, 

 multiflorcB, umbelliformes, foliis multoties breviores; pedun- 

 culo 1 — 2 cm. longo, dense fulvo-tomentoso v. f ulvo-villoso ; 

 bracteis anguste lanceolatis, longe acuminatis, dense fulvo- 

 villosis, pedicellos superantibus, usque ad 17 mm. longis, 

 usque ad 3 mm. latis; pedicellis vulgo circiter 10 mm. longis, 

 dense fulvo-villosis v. sericeis. Calyx extus albido- v. fulve- 

 scenti-villosus v. sericeus, int^^s albidosericeus; laciniis oblongis 

 v. anguste ovatis v. ellipticis, breviter acuminatis, tubo co- 

 rollse sequilongis v. paullulo brevioribus, circiter 16 mm. 

 longis, 7 mm. latis; squamis triangularibus, truncatis, apice 

 irregulariter dentatis, extus basin versus pilis longis, nitidis, 

 ± adpressis vestitis, ceterum glabris (inter squamas binse 

 adsunt squamulse iiliformes, squamis subsequilongee). Corollae 

 lutefE tubus 16 — 18 mm. longus, circiter 5 mm. crassus, cy- 

 lindraceus, extus albido-sericeus v. villosus, intus inter fila- 

 menta barbatus, ceterum glaber, fauce in plicam callosam 

 albam producta, circiter 2 mm. infra marginem calli appendi- 

 cibus 5 albis, linearibus v. apicem versus angustatis, circiter 

 2,5 mm. longis, obtusis v. paullulum emarginatis, intus sulco 

 longitudinali munitis iustructus; lobi patentissimi, 8 — 9 mm. 



