XVII. A NEW SPECIES OF IBIUIUM (G VROSTACHYS). 

 By Otio E. Jexxixgs. 



Ibidium incurvum sp. nov. 



Radicibus pluribus fere 2-8, carnosis fasciculatis : caule 1.5-6 dm. 

 alto, superne dense et minutissime glanduloso-pubescente : foliis caul- 

 inis niediis el superioribus 2-6, bracteiformibus, basi vaginantibus, 

 apice aiiguste acutis vel elongato-acurninatis ; foliis radicabbus et 

 fob'is caulinis inferioribus 2-7, acutis vel raro obtusiusculis, 3-20 cm. 

 longis, .4-1.S cm. latis ; foliis radicalibus lineari-oblongis vel ovatis, 

 parte basali abrupte angustata in petiolum marginatum ; foliis caulinis 

 inferioribus linearis vel lineari-oblanceolatis, inferne sensim angustalis 

 in basin vaginantem, foliis caulinis superioribus vaginantibus bractei- 

 formibus : spicis 8-15 cm. longis, 1.6-2.5 cm. latis, obtusis, densis, 

 multifloris ; bracteis ovatis, cum 23 parte florum jequilongis, apice 

 elongato-acuminato : tloribus sessilibus, albis vel raro subluteis, 1.4- 

 1.9 cm. longis, recurvato-patentibus ; ovario et sepalis ad basin 

 minutissime glanduloso-pubescentibus ; sepalis triangulari-lanceolatis, 

 acutis vel obtusiusculis, i.i-j.6 cm. longis, 2-3 mm. latis ; petalis 

 lateralibus cum sepalis Kquilongis, oblongo-lanceolatis, apice late 

 obtusis vel suborbiculatis, plus minusve crenulatis, ad basin nervis 

 lateralibus bifurcatis ; labello 1.2-1.7 cm. longo, 4-7 mm. Jato, plus 

 minusve unguiculato, medio plus minusve contracto, apice obtuso 

 aut etiam orbiculato plus minusve laciniato, basi truncato-vel cordato- 

 orl)iculato, nervis bifurcatis ; callis gracilibus incurvis, basi dense 

 pubescentibus et plus minusve glanduloso-pubescentibus : capsulis 

 obovato-oblongis, sjepe curvis, 1-1.4 cm. longis. 



Roots several, mostly 2-8, fleshy, fascicled: stem 1.5-6 dm. high, 

 above densely and minutely glandular-pubescent : middle and upper 

 cauline leaves 2-6, bract-like, sheathing at the base, at the apex nar- 

 rowly acute to long acuminate ; basal leaves and lower cauline leaves 

 2-7, acute, or rarely somewhat obtuse, 3-20 cm. long, .4-1.8 cm. 

 wide ; basal leaves linear-oblong to ovate., the lower part abruptly 

 narrowed to a margined petiole ; the lower cauline leaves linear to 

 linear-oblanceolate, gradually narrowed below to a sheathing base, the 



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