WOOTON AND STANDLEY FLOEA OP NEW MEXICO. 427 



14. SIDANODA (Robinson) Woot. & Standi. 



Sidanoda Woot. & Standi, gen. nov. 



Anoda section Sidanoda Robinson in A. Gray, Syn. Fl. 1': 320. 1897. 



Erect, much, branched annuals, with short stellate pubescence; leaves varioiia in 

 outline, alternate, long-petiolate ; flowers small, long-pediceled, in open racemes or 

 panicles; petals yellow or blue; carpels 5 to 9, depressed or ascending, dorsally 

 umbonate or ehort-cuspidate, puberulent, never hirsute; seeds resupinate-pendulous. 



Type species: Anoda pentaschista A. Gray. 



1. Sidanoda pentaschista (A. Gray) Woot. & Standi. 



Anoda ■pentaschista A. Gray, PI. Wright. 2: 22. 1853. 



Type locality: Valley between Ojo de Gavdlan and Condea Camp, beyond the 

 Copper Mines, New Mexico. Type collected by Wright (no. 893). 



Range: Western Texas to southern Ai-izona and adjacent Mexico. 



New Mexico: Between Ojo de Gavilan and Condes Camp; Mesilla Valley. Lower 

 Sonoran Zone. 



Order 34. HYPERICALES. 



KEY TO THE FAMILIES. 

 Styles wanting. 



Herbs; placentae axial 90. ELATINACEAE (p. 427). 



Shrubs; placentce basal 91. TAMARICACEAE (p. 427). 



Styles present. 



Petals united to above the middle 92. FOUQUIERIACEAE (p. 428). 



Petals distinct, or merely coherent at the 

 base. 



Styles united 95. VIOLACEAE (p. 428). 



Styles distinct. 



Sepals united into a tube; leaves 



not pellucid-dotted 93. FRANKENIACEAE (p. 428). 



Sepals distinct; leaves pellucid- 

 dotted 94. HYPERICACEAE (p. 428). 



90. ELATINACEAE. Waterwort Family. 



1. ELATINE L. Waterwort. 



Small, fragile, often aquatic, glabrous herbs with opposite or whorled leaves; 

 flowers minute, usually solitary in the axils; sepals 2; petals and stamens 2 or 3; 

 capsules subglobose, rarely 1 mm. in diameter; seeds small, striate. 



1. Elatine americana (Pursh) Arnold, Edinburgh Joum. Sci. 1: 430. 1830. 



Peplis americana Pursh, Fl. Amer. Sept. 238. 1814. 



Type locality: Pennsylvania. 



Range: British America to Oregon, New Mexico, and Virginia. 



We have seen no specimens of this from New Mexico, but in the Botany of the 

 Mexican Boundary it is reported fi'om "hills near the Copper Mines," collected by 

 Bigelow. 



91. TAMARICACEAE. Tamarix Family. 



1. TAMARIX L. 



1. Tamarix gallica L. Sp. PI. 270. 1753. Salt cedar. 



Type locality: "Habitat in Gallia, Hispania, Italia." 



A cultivated plant, used very effectively for hedges in many places, often escaped. 

 It may be recognized by its habit, which suggests the name of cedar (though it is 

 not evergreen), and by its large panicles of small pink flowers borne profusely in 



