400 PROCEEDINGS OP THE AMERICAN ACADEMY 



simiB et corolliE iuserta, simplex, e squamis 5 planis obovato-quadrads 

 apice exciso-truncatis constans, antheras superans. Antherse tribi, sed 

 prorainentes, subcoriaeeae, latissimae, stigraatis discum baud explanatum 

 brevissime superantes, membrana oblonga tenui byalina superataj. 

 Polliuia oblonga, horizontalia, curvula. Stigma umbone terminatum. 

 Folliculi ovato-fusiformes. — Herbte bumiles, omuiiio erectte, e radice 

 crassa fusiformi vel tuberosa perennes, birsutaj, foliosa^ ; foliis oppo- 

 sitis (paucisve alteruis) obloogis utrinque obtusis penninerviis, imis 

 nunc cordatis ; floribus ad axillas umbellato-congestis, pedunculo bre- 

 vissimo vel nullo. — Pherotricliis, Decaisne in Ann. Sci. Nat. ser. 2, 

 ix. 322, & Endl. Gen. 179S ; Gray, Syn. Fl. ii. (ed. 2), 462. Lachno- 

 stomatis sp., Decaisne in DC. Prodr. viii. G02. 



P. Balbisii. Fusco-hirta ; corollas lobis acutiusculis intus sub lana 

 venoso-retioulatis ; corona3 squamis umbone augusto-conico stigmatis 

 adaequantibus, apice latissime excise quasi bilobo. — Asclepias villosa, 

 Balbi in Mem. Acad. Turin, vii. 331, t. 4. Cynanchum villosinn, Rccm. 

 & Schult. Syst. vi. 103. Pherotrichis, Decaisne, 1. c. Gunoluhus 

 'pogonanthns, Hemsl. Biol. Centr.-Am. Bot. ii. 333, quoad pi. Gbies- 

 breglit. — Plant as to the original of the Turin Garden of unknown 

 origin, but evidently the same as Ghiesbreght's no. 670, from Chiapas, 

 S. Mexico. The umbo which surmounts the stigma is longer than all 

 the rest of the gyno-androecium, but is narrower at base than the disk 

 whicli supports it. Balbi figures the follicles, which accord with those 

 of the following species, and show some of the liairs which jirobably 

 equally cover it when young. 



P. ScHAFFNERi. Minus liirsuta ; corollfe lobis obtusis, venis usque 

 ad apicem nerviformibus simpliciusculis; coron?e squamis umbone 

 maximo stigmatis subgloboso brevioribus, apicis truncati angulis vix 

 productis ; folliculis fusco-hirsutis demum glabrescentibus. — Goiio- 

 lohis pogonanthus, Hemsl. 1. c, quoad pi. Parry & Palmer. — San 

 Luis Potosi, Northern Mexico, Schaffner.^ 63, Parry & Palmer, 586. 

 S. W. Arizona, near Fort Huachuca, Lemmon, 2816. 



This genus, which Decaisne partially indicated and afterwards sup- 

 pressed, being now luckily identified and two species indicated, well 

 merits restoration. It is certainly nearer to Lachnostoma, IIBK., than 

 to any part of Gonolohus. Yet the crown is not upon the corolla, 

 as in the former genus, the very stongly bearded corolla-lobes and 

 the stigma are quite peculiar, and moreover the plants are strictly 

 erect, with the habit of Asclepias or Acerates. The anthers are 

 appendaged with a distinct hyaline tiji, which, however, would easily 

 be overlooked. 



