346 PROCEEDINGS OF THE AMERICAN ACADEMY 



tube is apt to be glabrous or glabrate. The color is mostly rose or 

 pink. The lips, indeed, are often " subrequal " ; but it is the upper 

 (not the lower) lip which sui'passes the other, sometimes strikingly so 

 when fully developed. This is especially the case in the small-leaved 

 section, where the erect or falcate upper lip, produced much beyond 

 the short and 3-cleft lower one, calls to mind the corolla of a Castilleia. 

 The bearded annulus is wanting in S. rotundifolia, S. cordata, and 

 nearly so in what I take to be S. macrantha, therefore probably in S. 

 sessills. The stamens equal the upper lip, or are exserted beyond it. 

 The following conspectus of the species will be convenient. 



* Corolla exannulata. Verticillastri sccpius G-Jlori. 



Folia longius petiolata: nervi calycis obsolcti. 



Hirsuto-hispida : calyx 5-fidus : cor. lab. supcrius productum. S.mactantha. 



Glabrata : calyx breviter dentatus : corolla; labium supcrius 



inferiori vix longius : filamenta villosa ! S. rotundifolia. 



Folia vix petiolata, glabra : calyx ncrvosus, 5-lobus. 



Folia subpctiolata : calycis lobi acuti. S. cordata. 



Folia arete sessilia : calycis lobi lati obtusi. S. sessilis. 



* * Corolla villoso-annulata. 



Folia majora, longius petiolata : verticillastri sapius 6-flori : labia corolla; subaequi- 

 longa vel supcrius paullo longius. 

 Calycis nen'i obscuri, dentcs breves obtusi. Folia submcmbranacca. 

 Subglabra, caule angulis hirsutis : folia rotundata : pedicelli 



calycem vix sequantes. S. calaminthoides. 



Glabra : folia ovata, acuta : pedicelli calycc longiores. S. scrophularioides. 



Calycis pra;sertira fructiferi nervosi, lobi acuti : folia rlgida. 



Erccta : folia ovata scu oblonga. S. rugosa. 



Procumbens : folia oblongo- seu lanceolato-linearia : verticil- 

 lastri biflori. S. angustifoUa. 

 Folia parva, pleruuique petiolata : caules ramosissimi diflfusi : verticillastri biflori : 

 coroUte (viridula;) fauce minus ampliatse, labium superius insigniter pro- 

 ductum : stamina exserta. {MicropkylUe.) 

 Glabra : folia acute serrata vel incisa, basi angustata. S. microphylla. 

 Hispida : folia oblonga, obtusa, grosse crenata. S. crenata. 

 Villoso-pubescens : folia rotundata, basi truncata vel subcor- 



data, grosse crenata. S. diffusa. 



Stenogtne macrantha (Benth. ?): pilis patentibus undique mol- 

 liter hispida ; foliis subrotundis vel ovatis crenatis basi stepius cordatis 

 submembranaceis longiuscule petiolatis ; verticillastris 6-floris ; pedicel- 

 lis calyce 5-lobo sequilongis, utrisque hi.spidis ; filamentis subnudis ; 



