66 ^ PROCEEDINGS OF THE AMERICAN ACADEMY 



To obviate confusion or mistake wliich may arise as to the priority of 

 Elliott's names over those of Nuttall, it sliould be recorded that, al- 



AjTANTiiEnix, Nutt. (Gen.) Corolla sub anthesi reflexa. Columna sub cu- 

 cuUis brevissima. CucuUi adsurgentes, corollEe aequiloiigi, antlieras longe supe- 

 rantes, oblongoclavati apice incurvo, a latere compressi, praeter niarginem 

 ventralem anguste apiceque dilatato bilamellatum solidi, crista obtusissima 

 inclusa. Aiitlierarum alae ntembntnacere, deorsum valde dilatatfe, latissimas, basi 

 liorlzontaliter tnincatffi. Caudiculaj capillares poUijiiis oblongis 2-8 j)lo longiores ! 

 Folia opposila. — A. connivens. A. viridis, Nutt. Gen. excl. syn. Asclejiins viridis, 

 Walt. 



AscLEPiODORA. Corolla rotato-patens. Cuculli basilares coluninfpbrevissimae 

 totffi inserii, patenti-adsurgentes, calceolifornies, prorsus cavi, versus apicem 

 crista lamellitbrmi quasi bilocellati. Antlierarum alas corneae basi pi. ni. angus- 

 tat£e. Cnudicula polliniis pyr'forinibus breviores. Folia sjei)ius alterna. — 

 A. VIRIDIS. A^chpias viridis, Walt. Anantherix jmnicidafmt, Nutt. Trans. Am. 

 Plul. Soc. V. 202. ulcerate joa/ijc((/a/a, Decaisne. — A. decumuens. Anantherix 

 decurnhens, Nutt. 1. c. 



Asclepias, L. Corolla sub anthesi fere semper reflexa. Cueulli intus pro- 

 cessu c'oriiifonni vel crista^fornii audi. Antlierarum alfe corneiB deorsum usque 

 ad basim truncatam seu late rotiindatam dilatatae. Folia sanpius opposita. 



* * Cuculli intus prorsus inappendioulati : corolla sub anthesi reflexa. 



AcERATES, Ell. Cuculli involuto-concavi, intus aperti. Antlierarum alae 

 medio vel supra medium (nee basi) dilatatae vel angulatce. Folia sa^pius alterna 

 vel subalterna. Cfet. Aschpiadis. 



ScHizoNOTUS. Cuculli saccati, ovales, intus toto longitudine columnae ad- 

 nati, extus longitudinaliter bivalves. Antherae, etc., Aceratis. Folia opposita. — 

 S. PURPURASCENS. Goinpliocarpiis purpuruscens, Gray, Bot. Calif, i. 477. 



GoMPHOCARPUS, R. Br. Cuculli intus vel apice aperti. Antherae, etc., Ascle- 

 piadis. 



ASCLEPIAS, L. 



An American genus except for two African species, mainly North American. 

 I do not see the way to a really natural arrangement of our species ; but the 

 following may serve as a key to them. 



§ 1. Cuculli sessiles, nee basi attenuati: antlierarum alae basi latae angulato- 

 truncatae vel auriuulato-deflexae, rarius rotundatae. 



* Corolla cum corona aurantiaca : folliculi nudi in pedicello decurvo arrecti : 

 folia pleraque alterna vel sparsa : herba non lactescens ! 



A. TUBEROSA, L., et var. decumbens. 



* * Corolla laete rubja vel purpurea : folliculi nudi, in pedicello decurvo arrecti, 



A. Curassavica & A. incarnata exceptaj. 



-1- Cuculli aurantiaci : columna sat longa : herbae glabrae. 



A. CcRASSAvicA, L. Naturalized if not native in Florida, &c. ; now widely 

 dispersed over the tropical coasts. 



A. PAL'PERCULA, Michx. A. lanceolata, Walt., a name which might be restored. 



