Plantae novae Pennsylvanicae. 203 



thirds the length of the petals; style slightly longer than the stamens, 

 the lobes of the stigma linear, widely spreading, 4-6 mm long. Mature 

 capsule not seen; ovary sessile, oblong to slightly obovate, faintly winged, 

 densely pubescent with ascending hairs. 



Pennsylvania: Dry upland field near Kittanning, D. R. Sumstine, 

 June, 1905. Type specimens in the Pennsylvania Herbarium of the 

 Carnegie Museum. Ace. No. 2905. 



This species is evidently nearly related to Kneiffia fruticosa (Linnaeus 

 Raimann, perhaps more closely to Kneiffia fruticosa pilosdla (Rafinesque- 

 Schmaltz) Britton, but in general appearance it is quite different, the 

 strictly simple habit, the large leafy bracts, and the more densely inflores- 

 cence serving to differentiate it at once. Further differences are apparent 

 in the mostly reflexed, silvery pubescence, and the widely diverging, 

 tomentose-pubescent calyx tips. In the dried specimens at least, there 

 is no discernible inequality in the length of the stamens, the species 

 thus apparently overstepping what is usually regarded as a generic 

 character. 



2. Ibidium incurvum Jennings. 1. c. Ill (1906), p. 483, pi. XX. 



Radicibus pluribus fere 2 — 8, carnosis fasciculatis : caule 1,5 — 6 dm 

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

 mediis et superioribus 2-6, bracteiformibus, basi vaginantibus, apice 

 anguste acutis vel elongato-acuminatis ; foliis radicalibus et foliis caulinis 

 inferioribus 2 — 7, acutis vel raro obtusiusculis, 3 — 20 cm longis, 0,4 — 1,8 cm 

 latis; foliis radicalibus lineari-oblongis vel ovatis, parte basali abrupte 

 angustata in petiolum marginatum; foliis caulinis inferioribus linearis ve 1 

 lineari-oblanceolatis, inferne sensim angustatis in basin vaginantem, foliis 

 caulinis superioribus vaginantibus bracteiformibus: spicis 8 — 15 cm longis. 

 1,6 — 2,5 cm latis, obtusis, densis, multifloris; bracteis ovatis. cum 2 / 3 parte 

 florum aequilongis, apice elongato-acuminato: floribus 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, 1,1 — 1,6 cm longis, 2—3 mm latis; 

 petalis lateralibus cum sepalis aequilongis, 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 lato, plus 

 minusve unguiculato, medio plus minusve contracto, apice obtuso aut 

 etiam orbiculato plus minusve laciniato. basi truncato-vel cordato-orbi- 

 culato, nervis bifurcatis; callis gracilibus incurvis, basi dense pubes- 

 centibus et plus minusve glanduloso-pubescentibus: capsulis obovato- 

 oblongis, saepe curvis, 1 — 1,4 cm longis. 



Pennsylvania: The type specimens, now in the Pennsylvania Her- 

 barium of the Carnegie Museum, were collected by the writer on Presque 

 Isle, Erie, Aug. 24—26, 1905. The plants were quite abundant in the 

 damp sand surrounding the ponds in the more recently formed land at 

 the eastern end of the peninsula. In the herbarium of the Carnegie 

 Museum are other specimens of this species, collected also on Presque 



