450 BCLI.KriN DE l'herbier BOISSIER (2^6 SÉR.). 1907 (52) 



Vit Sida nouveau du Chaco septentrional. 



Sida Rojasii Hassler spec. nov. 



Suffnitex 0,6-0,8 m.; radix crassa lignosa; caules plures, erecli 

 flexuosi, pauci-ramosi, basi lignescentes, lereles 3-4 mm, crassi, pilis 

 slellatis flavescenlibus, densis, scabridis tomenlosi; ramuli pauci brèves, 

 ex axillis foliorum inferiorum, ut caules dense scabrido-lomenlosuli; 

 internodia 3-7 cm.; stipiilœ lineari-subulalse, persistentes, Stella to pilosee, 

 cum indumento vix 0,5 mm. latae, 8-10 mm. longse; folia spiraliler dispo- 

 sila, manifeste peliolata; petiolus 10-30 mm. longus, basin versus superne 

 leviter canaliculatus, ut caules scabrido-tomentosus; lamina tenuissime 

 papyracea, forma sal variabili, in foliis caulinis medianis et inferio- 

 ribus ovali-lanceolata, ovali-elliplica, vel late-elliptica, 115/40 120/55 

 140/65 mm., in foliis apicalibus et ramulorum oblonge, oblongo-lanceo- 

 lata, lanceolata vel elliplica 60/25 80/30 60/24 60/30 mm. apice acula, 

 basi rotundata vel rarius subcuneata, margine grosse et irregulariter cre- 

 nalo-serrata vel crenata, supra viridis pilis stellatis sparsis scabriuscula, 

 sublus cano-viridescens, indumento Stella todensiorescabrido-tomentosula, 

 nervi basales 5-7, supra conspicui,paulo prominentes, subtusvaldeexsculpti. 



Inflorescentia stricte axillaris, e fasciculos vel umbellulas subsessiles 

 3-7 floras composite; pedicelli 5-7 mm. longi, lereles, dense stellato- 

 pubescentes; calyx campanule lo-subturbina tus 6 mm. altus in lobos 

 5 ovali-aculos usque ad 7» divisus, inlus pilis slellatis appresis puberulus, 

 extus, pilis slellatis palenlibus, flavescenlibus, pilosus; petala 5 obovala 

 leviter inaequilalera 7 mm. longa el 4-5 mm. lata, basin versus longe 

 cunealo-enguslete, trectu brevi (ce. 1 mm.) tubo stemineo ednata, gleber- 

 rime, lutea basi purpurascentes; tubus stamineus gleber 3 mm. altus, 

 ad apicem in filamenta multa ce. 1,5 mm, longa divisus; antherœ parvse 

 globoso-reniformes; ovarium depresso hemisphsericum 10-lobum, ce. 

 2 mm. diametro, dense elbido-slelleto-lomentosum; styli 10 ad V^ liberi 

 5 mm. longi, Stigmata capilellate. Calyx frucliger erecto-patens, lobis car- 

 pidia non involventibus, carpidia 10 trigona, dorso rolundate, erostrata, 

 reliculato-rugose, dorso stellato pubescentie, ce. 2 mm. aile et lela, ochro- 

 leuce ; semen Irigono rotundatum ce. 1,5 mm. testa obscure purpurascente 

 opaca, punctulata, pilis hyalinis crispulis sparse vestila. 



Species nove e seclione Malvinda K. Sch. Sida acuminata DC. et Sida 

 purpurascente Salzm. imprimis affinis. 



