STANDLEY TEEES AND SHRUBS OF MEXICO. 1201 



DOUBTFUL SPECIES. 



Opeeciilina ampliata (Choisy) House, Bull. Torrey Club 33: 503. 1906. 

 Ipomoea ampliata Choisy in DC. Prodr. 9: 361. 1845. Type from Campeche. 

 Leaves said to be subtrilobate. 



5. CALONYCTION Choisy, Mem. Soc. Phys. Hist. Nat. Gen&ve 6: 440. 1833. 



Plants scandent, usually glabrous; leaves cordate, entire or lobate; flowers 

 large, white or purple, axillary, cymose or solitary ; sepals unequal ; corolla 

 salverform, with long slender tube and broad limb ; stamens exserted ; stigma 

 capitate, bilobate ; fruit 2-celled. 



Corolla purple 1. C. muricatum. 



Corolla white. 



Outer sepals with stout hornlilje appendages 2. C. aculeatum. 



Outer sepals not appendaged 3. C. tastense. 



1. Calonyction muricatum (L.) Don, Hist. Dichl. PI. 4: 264. 1838. 

 Convolvulus muricatus L. Mant. PI. 1: 44. 1767. 



Ipomoea muricata Jacq. PI. Hort. Schonbr. 3: 40. 1798. 



Ipomoea spinulosa T. S. Brandeg. Zoe 5: 169. 1903. 



Baja California to Sinaloa, Chihuahua, and Yucatan. Northern South 

 America. 



Plants glabrous, the stems usually armed with short stout recurved prickles ; 

 leaves broadly cordate-ovate, 5 to 16 cm. long, acuminate, deeply cordate at 

 base; flowers solitary or in few-flowered cymes, the pedicels thickened above; 

 outer sepals subulate-cuspidate; corolla tube 3 to 5 cm. long; seeds glabrous. 



2. Calonyction aculeatum (L.) House, Bull. Torrey Club 31: 590. 1904. 

 Convolvulus acuceatus L. Sp. PI. 155. 1753. 



Ipomoea alba L. Sp. PI. 161. 1753. 



Ipomoea bona-nox L. Sp. PI. ed. 2. 228. 1762. 



Calonyction speciosum Choisy, Mem. Soc. Phys. Hist. Nat. Geneve 6: 441. 

 1833. 



Calonyction lona-nox Bojer, Hort. Maur. 227. 1837. 



Ipomoea aculeata Kuntze, Rev. Gen. PI. 2: 442. 1891. 



Baja California and Sinaloa to Veracruz, YucatSn, and Chiapas. Widely 

 distributed in tropical regions of both hemispheres. 



Stems herbaceous or suffrutescent, often armed with recurved prickles; 

 leaves 5 to 15 cm. long or larger, entire or 3 to 5-lobate, acuminate, glabrous; 

 peduncles 1 or few-flowered, the pedicels much thickened in age; corolla tube 

 8 to 12 cm. long, the limb 6 to 10 cm. broad ; capsules about 2 cm. long ; seeds 

 shining, dark brown or nearly black, minutely pubescent. " Bejuco de puerco," 

 " bejuco de vaca" (Porto Rico); " galfln de noche," "bejuco de tabaco," 

 "garza," "pitoreta" (El Salvador). 



The vine is commonly cultivated under the name of " moonflower." The 

 large, very showy flowers open late in the evening. The milky juice is em- 

 ployed in tropical America for coagulating the latex of Costilla, the rubber 

 tree. In India the young seeds are eaten, and the plant is there a popular 

 remedy for snake bites. In El Salvador the stems are employed for hanging 

 tobacco to dry. 



3. Calonyction tastense (T. S. Brandeg.) House, Bull. Torrey Club 33: 318. 



1906. 

 Ipomoea tastensis T. S. Brandeg. Zoe 5: 108. 1903. 

 Type from the Sierra El Taste, Baja California. 



