72 PROCEEDINGS OF THE AMERICAN ACADEMY 



lanceolatis apice crassiusculo recurvo intus piiberulis basim versus 

 penicillato-barbulatis : corona phyllis spathulato-oblongis planis crassi- 



A. ANGUSTiFOLiA, Ell. Sk. i. 325, 1817. A. tuberosa ? Walt. Car. fide Eil. 

 A. Michanrii, Decaisne, 1. c. : so named because a specimen in Micliaux's herba- 

 rium is mixed with his A. longifolia ; but Elliott's specific name has priority 

 of all homonj'ms. The narrow and elongated thickish leaves are mainly 

 alternate, which marks the species. 



A. viRiDULA, Chapm. Fl. 302. A well marked species, with opposite and 

 very narrow leaves, most resembling tlie following ; but with smaller yellowish- 

 green flowers, and hoods considerably exceeding the anthers and the horn. 

 — Found only in the vicinity of Apalachicola, Florida. 



3. Columna sub cucuUis nulla : folia opposita. 



A. ciNEREA, Walt. Well distinguished by the few-flowered lax umbels, and 

 short very obliquely dorsally truncate hoods, the ventral cusps of which surpass 

 the broad-triangular horn. 



b. Corolla cum calyce rotato-patens, nunquam reflexa : crista mutica adnata in 

 cucuUo. 



A. Fkayi, Chapman in litt. A. cinerece subsimilis ; foliis fere filiformibus 

 longis patentissirais ; umbellis terminalibus et subterminalibus brevi-peduncu- 

 lat'is paui'ifloris ; corolla alba majuscula explanata ; cucullis etiam albis prajter 

 costam petaloideis oblongis integris involuto-concavis antheris aequilongis sed 

 patenlibus intus dorso medio lamella semiovali integerrima instructis. — Tampa, 

 Florida, Dr. Leavenworth (a single specimen in herb. Torr., collected 40 jears 

 ago), Dr. Wm. T. Feay, Dr. A. F. Garber. Dr. Chapman proposed to call this 

 an Acerates, but in my view it is clearly an Asclepias. 



§ 2. PoDOSTEMMA. CuculH stipitati, erecti, stipitibus antheraslonge superanti- 

 bus basibus columnae adnatis, lamina spathulata intus cristata, crista insequal- 

 iter bicorniculata : antherarum aliB medio latiores et subangulatae. 



A. i.oNGicoKNU, Benth. A. Litidhrimerl, Engelm. & Gray. — Ranges from 

 Texas to Nicaragua. Follicles arrect on the deflexed pedicels. 



§ 3. NoTHACERATES. CuculU sessiles, oblongi, apice bidentati, intus crista 

 angusta jjrorsus adnata e sinu corniculato-excurrente : antherarum alffi 

 deorsum dilatat;B, supra basim late rotiindatam auriculatoemargiiiatfe : pol- 

 linia arcuato-obovata. Habitus Acerutis aiiriculuke. 



A. STENOPHYLLA. Poli/otiis nnf;iistifi>liiis, Nutt. in Trans. Anier. Phil. Soc. v. 

 201. Acei'iti's angustifoUa, Decaisne in DC. 1. c. Nuttall noted the clear transi- 

 tion to Asclepias. 



ACERATES, Ell. 

 « Gynostemium subglobosum : columna sub cucullis brevibus manifesta : folia 

 pleraque allerna. 



A. AURicuLATA, Engelm. in Bot. Mex. Bound. 160. Foliis preelongis ang s- 

 tissimis umbellisque ^.sc/«=/»Vu/t stenophylhe simillima; cucullis basi late auric i- 

 latis ; antherarum alls angustis utrinque sequilatis. 



