STANDLEY TEEES AND SHEUBS OF MEXICO 1365 



Low shrub with stout spreading branches; leaves 5 to 16 mm. long, acute, 

 scaberulous or glabrate; cymes mostly 3-flowered; corolla white, the tube 2 to 

 5.5 cm. long. "Hierba de San Juan." 



29. Bouvardia latifolia Standi. N. Amer. Fl. 32: 111. 1921. 



Type from Monte de la Piedra, near Aguila, Guerrero, altitude 450 meters. 

 Shrub, 1.5 meters high; leaves broadly ovate, 2.5 to 4 cm. long, acute or 

 acutish, finely puberulent beneath along the nerves or glabrous; corolla white. 



30. Bouvardia longiflora (Cav.) H. B. K. Nov. Gen. & Sp. 3: 386. 1820. 

 Aeginetia longiflora Cav. Anal. Hist. Nat. (Madrid) 3: 130. 1801. 

 Houstonia longiflora A. Gray, Proc. Amer. Acad. 4: 314. 1860. 

 Bouvardia purpusii T. S. Brandeg. Univ. Calif. Publ. Bot. 10: 415. 1924. 

 San Luis Potosi to Michoacan and Oaxaca; type material from Queretaro and 



Guanajuato. 



Shrub, 1 to 1.5 meters high; leaves ovate or lanceolate, 2 to 4.5 cm. long, 

 acute or acuminate, glabrous; flowers solitary, terminal and axillary; corolla 

 white; capsule 8 mm. in diameter. "Flor de San Juan" (Queretaro, Hidalgo, 

 Oaxaca); "rosa de San Juan" (Me.xico). 



The flowers are very fragrant. They are used for scenting ointments and 

 similar preparations. 



DOUBTFUL SPECIES. 



Bouvardia cordifolia DC. Prodr. 4: 366. 1830. Type from somewhere 

 in Mexico. 



Bouvardia rosea Schlecht. Linnaea 26: 116. 1853. Type from San Jose 

 de Oro. 



Bouvardia xylostegides Hook. & Arn. Bot. Beechey Voy. 428. 1841. Type 

 from Oaxaca. Probably not of this genus. 



12. CALYCOPHYLLUM DC. Prodr. 4: 367. 1830. 

 1. Calycophyllum candidissimum (Vahl) DC. Prodr. 4: 367. 1830. 



Macrocnemum candidissimum Vahl, Symb. Bot. 2: 38. 1791. 



Guerrero to Chiapas and Campeche. Guatemala to Colombia; Cuba; type 

 from Santa Marta, Colombia. 



Tree, 5 to 20 meters high, the trunk sometimes 60 cm. in diameter; bark 

 reddish gray, scaly or furrowed; leaves petiolate, rounded-oval to ovate, 4 to 

 13 cm. long, abruptly acuminate, acute or obtuse at base, glabrous or nearly so; 

 flowers in terminal corymbs; calyx cylindric, the limb truncate, or often expanded 

 into a large white slender-petiolate blade 1 to 3.5 cm. wide; corolla white, short- 

 funnelform, the tube 3 mm. long, the 6 to 8 lobes shghtly longer; capsule oblong- 

 cylindric, 6 to 10 mm. long; seeds numerous, winged at each end; wood hard, 

 heavy, very strong, fine-grained, durable, taking a good polish. "Camar6n," 

 "palo camar6n" (Oaxaca); "dagame" (Cuba); "salamo" (Costa Rica, Guate- 

 mala, El Salvador); "alazano," "guayabo alazano," "harino" (Panama); 

 "madrono" (Guatemala, Honduras, Costa Rica); "solano" (Honduras). 



The wood is useful for carpentry and cabinet work. It is reported to have a 

 specific gravity of about 1.02. It is very fine-grained, and for that reason is 

 employed in Central America for making fine-toothed combs. When in flower 

 the tree is a very handsome one, being almost complete!}' covered with the showy 

 white bracts, which persist for a long time. 



13. EXOSTEMA L. Rich.; Humb. & Bonpl. PI. Aequin. 1: 131. 1808. 



Reference: Standley, N. Amer. Fl. 32: 117-126. 1921. 



Shrubs or trees; flowers small or large, axillary and solitary or in terminal 

 corymbs or panicles; calyx tube cylindric or obovoid, the limb 5-lobate; corolla 

 tube usually long and slender, the limb 5-lobate; capsule 2-celled, septicidally 

 bivalvate; seeds numerous, winged. 



