OP ARTS AND SCIENCES. 399 



gle, 104, 692. In habit between G. parvijlorus and G. pedunculatus. 

 But the crown is perfectly simple, with no internal crests or append- 

 ages, the margin abruptly produced into the five narrow and entire 

 lobes which overtop the anthers, these of the firm texture which is 

 common in the Chthamalia section, of which this species has wholly 

 the aspect. 



GoNOLOBUS CAUDATUS. Eugonolohus quoad flores, habitu alieno, 

 subglaber, suffruticoso-multicaulis e radice crassa ; caulibus erectis vel 

 subdifFusis ramosis foliosissimis ; foliis e basi latiuscula nunc cuneata 

 nunc truncata lanceolatis caudato-acuminatis infra medium undulatis 

 pollicaribus, petiolo submarginato lin. 2-4 longo ; pedunculis solitariis 

 binisve brevissimis unifioris ; sepalis linearibus ; corolla rotata atro- 

 fusca crassiuscula 5-partita glabra, lobis lanceolato-subulatis (lin. 2 

 longis) eveniis ; corona simplici annulari subcrateriformi carnoso in- 

 tegro discum stigmatis cingente : folliculi desunt. — Gravelly soil, on 

 the hacienda San Jose, about 25 miles south of Batopilas, Palmer, 

 75. The corona is quite entire or obscurely undulate, and has no 

 internal appendages except perhaps five obscure lamellae connecting 

 it with the under side of the sessile stigma-disk. 



GoxoLOBUs (Chthamalia) acu.mixatus. G. producto, Torr., 

 peraffinis ; foliis pariter protracto-acuminatis atque folliculo (glaber- 

 rimo) longissime acuminato ; corolla extus majus pubescente, fauce vil- 

 losula ; corona antheras superante 5-partita membranacea, lobis quasi 

 ovato-quadratis apice lato-truncatis intus medio ligula brevissima ovata 

 auctis (antheris baud adnatis). — Near Bachimba, 40 miles south of 

 the city of Chihuahua, Pringle, 56. In some specimens of G. pro- 

 ductus there is very slight adhesion of the lamelkc or ligula? of the 

 crown to the column under the anthers. 



GoNOLOBUS (Chthamalia) Schaffneri, Gray in Hemsl. Biol. 

 Centr.-Am. Bot. ii. 334, and G. bijidus, Hemsl. 1. c. 330, are mani- 

 festly the same species. The two names being of the same date, the 

 first is rather to be preferred : the second is less appropriate, because 

 the long ligules of the inner crown are not " bifid," except at the tip, 

 perhaps not always even there. 



PIIEROTRICHIS, Decaisne, gen. Asclep.-Gonolohearum restitutum. 



Calyx a basi 5-partitus, segraentis lanceolatis : glanduhe sinubus 

 oppositae solitariae. Corolla campanulata, ultra medium 5-fida, cras- 

 siuscula: lobi in alabastro leviter contorto-obtegentes, ovati, intus pilis 

 longis crebris primura retrorsis et medium versus inflexis comato-villo- 

 siscimi, dcxum rotato-patentes. Corona ad juncturam columnar brevis- 



