20 ARKIV FÖR BOTANIK. BAND 9. N:0 15. 



R. Lange mir besonders auf meinen Reisen in der Serra do 

 Mar leistete, habe ich mir erlaubt diese hübsche Art nach ihm 

 zu benennen. 



Compositae. 



Mikania clematidifolia n. sp. 



Tai 4, Fig. 2. 



Volubilis; rami graciles, teretes vel subangulati, striatelli, 

 fistulosi, atropurpurei, glaberrimi, ramulis plerumque brevibus, 

 angulate teretibus vel subquadrangulis, pilis brevibus, incur- 

 vatis pubescentibus; folia parva, opposita, longiuscule petiolata, 

 petiolis gracilibus, pubescentibus, ternata, membranacea, con- 

 coloria, in facie inferiore conspicue, in facie superiore minus 

 distincte glanduloso-punctata, subamplexicaulia, ramulina linea 

 trans versah conjuncta, marginibus breviter pilosis, segmentis 

 breviter petiolatis, intermedio late ovato velsubcordato, acumi- 

 nato, basin versus pauci-dentato, e basi 5-nervato, nervis subtus 

 emersis, ceteris majore, lateralibus valde assymetricis, basi 

 truncatis vel subcordatis, integerrimis vel subbilobatis, lobis 

 latis, rotundatis, calloso-apiculatis, e basi 3-nervatis; inflo- 

 rescentia corymbosa, bracteis foliaceis, parvis, oblongo-ovatis 

 vel subternatis munita, axillaris, corymbis parvis, densis, 

 longiuscule pedunculatis, pedunculis gracilibus, indumento 

 petiolorum donatis, pedicelhs brevibus pubescentibus; capitula 

 cylindrica, 4-flora; squamae involucri lineares, apicem versus 

 sublatiores, rotundate obtusae vel truncatae, extus glanduloso- 

 punctatae, subpubescentes vel fere glabrae, apice fimbriatae, 

 bracteola solitaria, subpubescente, squamis subbreviore addita; 

 corolla alba, apicem versus glanduloso-punctata, parte tubu- 

 losa angustata vix Vs long, coroll. occupante, parte ampliata 

 cylindrico-campanulata, dentibus brevibus triangularibus ; 

 achaenia glabra; pappus sordide albescens, setis c. 55, corolla 

 subbrevioribus. 



Caulis ad 1,5 m altus, c. 1,5 mm crassus; petioli plerumque 

 2 — 2,5 cm longi; lamina fol. c. 3 cm longa et 2 — 2,5 cm 

 lata; pedunculi 3 — 4 cm, pedicelli c. 2 mm longi; squamae 

 involucri c. 3 mm longae et 1 mm latae; corolla c. 4,5 mm 

 longa, parte tubulosa, angustata, c. 1,25 mm longa; setae pappi 

 c. 3 mm longae. 



