339 



18. ^J- mexicana Zuccar. Tab. XI f. et XV. 



M. caule volubili adpresse pi'loso, foliis ternatis, foliolis ovato- 

 oblongis obtusis vel acutiusculis , stipulis subulatis, leguminibus sub- 

 cylindricis cnerviis. 



Perennis, suffruticosa, sed jam primo anno florifera. Caules e 

 radice fibroso-lignosa plures, lignescentes, tenues , teretes, dextror- 

 sum volubUes, vix pennae corvinae crassilie, pilis adpressis adspersi, 

 virides vel basin versus sordide cinereo-fuscescentes, hie inde lineo- 

 lis atro- purpureis notati, parce ramosi. Folia alterna, inferiora 

 magis approximata, superiora remotiuscula, pinnatim ternata, petio- 

 lala ; pclioli basi incrassata articulati, serniteretes , superne canalicu- 

 Jali , pubescentes, patentes, circiter pollicares, inter foliola lateralia 

 et terminale in rachin 3 lineas longam producti ; foliola breviter 

 pedicellata, pedicellis 1 — %'" longis pubescentibus, ovato - oblonga, 

 integerrima, obtusa vel acutiuscula et nervo medio prominulo brevi- 

 ter mucronulata , basi rotundata, superne glabra, margine (sub lente) 

 pilis rigidis arcte adpressis ciliata , subtus pilis conformibus raris ad- 

 spefsa, \\ — 2" longa, 1 — \\" lata, terminali parum majori. Sli- 

 pulae brevissimae, subulatae, pubescentes, a peliolo liberae, virides; 

 Stipellae minutissimae, glabrae, virides, solitariae ad basin foliolorum 

 lateralium, binae infra terminale. Pedunculi vel axillares brevissimi, 

 biflori, flore altero plerumque abortivo, vel terminales, sed ob evo- 

 lutionem coetaneam gemmae ex axilla summi folii laterales et oppo- 

 ßilifolil, folium subaequantes, teretes, erecti, pilis adpressis albidis 

 adspersi ,3 — 5 - flori ; pedicelli brevissimi , vix lineaAi longi , basi 

 bractea suffulti brevigsima lineari - subulata adpressa pubescente, ip- 

 sique ad calycis basin muniti bracteolis duabus inferiori plane con- 

 formibus opposilis, calyci adpressis. Calyx tubulosus, oblonge -sub- 

 clavatus, compressus, pilis subulatis rigidis adpressis albidis adsper- 

 8U8, sub foecundatione genitalia plane includens, denique spathaceo- 

 fissus et infra legumen persistens ejusque basin amplectens, subbila- 



43- 



