38 ARKIV FÖR BOTANIK. BAND 13. N:0 3. 



I. Stirps X. subulatse. 



Species humiles, csespitosse, foliis anguste ensiformi-line- 

 aribus v. leviter tantum compressis, 0,5 — 1 mm, rarius usque 

 1,5 mm latis, vulgo pro rata longis (dimidium scapum sub- 

 sequantibus), ssepissime utraque v. altera acie tuberculato- 

 scabridulis, vagina quartam v. tertiam partem folii occupante, 

 jam superne lamina valde v. paullulo tantum latiore; scapis 

 gracilibus, subteretibus v. leviter compressis. Spica pauci- 

 flora, fusiformis v, ellipsoidea, 5 — 8 mm longa, bracteis (infi- 

 mis brevibus) subcoriaceis v. coriaceis, obscure ferrugineis, 

 nigricantibus v. nigris, paullulum cochleatis, sub apice ssepe 

 nonnihil carinatis, area dorsali plane nulla. Sepala lateralia 

 libera, lanceolata v. lineari-lanceolata, rarius spathulato-line- 

 aria, ala carinali angustissima, nuda v. minutissime ciliato- 

 scabridula, rarius superne nonnihil lacerato-dentata v. lace- 

 rato-fimbriata. 



Conspectus specieruin. 



I. Sepala lateralia acuta, ala carinali nuda v. ciliato-sca- 

 bridula. 



1. Folia ensiformi-linearia, altera v. utraque acie tubercu- 

 lato-scabridula, vagina superne lamina vix v. paullulo 

 tantum latiore. 



A. Folia altera acie tuberculato-scabridula, ceterum laevia. 



— — — X. suhulata Ruiz & Pavon 1. 



B. Folia utraque acie tuberculato-scabridula, ceterum 

 subtiliter transverse rugulosa. 



X. acutifolia (Heimerl) Malme — 2. 



2. Folia leviter tantum compressa, omnino Isevia, vagina 

 jam superne lamina multo latiore. 



~ X. stenophylla Alb. Nilsson — — 3. 



II. Sepala lateralia obtusiuscula, ala carinali superne 

 lacerato-dentata v. lacerato-fimbriata. (Folia saltern inferne 

 subtiliter transverse rugulosa.)— — — — — 



— — — X. Columbiana Malme — — — — — — 4. 



Die hierhergehörigen Pflanzen sind hauptsächlich in der 

 nördlichen Anden-Zone der nördlichen hochandinen Provinz 

 sowie in der columbischen Zone der subäquatorialen andinen 

 Provinz zuhause, wo sonst nur eine Xyris, X. andina, ange- 



