MONOPETALOUS EXOGENOUS PLANTS. 399 



leaves erect, linear; pedimcles as long as tlie leaves, or the 

 uppermost longer; ccdj/x truncate, Avith minute teeth; 

 lobes of the corolla nearly equal, fringed on the margins; 

 capsule large (3" wide), globose, one-third longer than the 

 calyx. Sleni 2°-3° high; leaves 1' long; corolla 1' long, 

 pubescent. 



tt Lobes of the corolla nearly equal, spreading. 

 X Pedicels as long oj' twice as long as the calyx, shorter than the leaves. 



G. APHYLLA, Nutt. Stem 2°-3° high, smooth, 4-angled 

 sparingly branched near the summit; leaves minute, 1" 

 long, subulate, appressed ; flowers mostly alternate, on one 

 side of the spreading branches ; pedicel as long as the calyx ; 

 cali/x-teeth minute, obtuse ; corolla J' long, hairy within, 

 the upper lobes reflexed ; capsule globose, 2" long, twice as 

 long as the calyx. 



G. PARViroLiA. stem rough, striate, 12-18' high, the 

 slender branches erect; leaves 4"-6" long, opposite or alter- 

 nate, linear, very rough, rather obtuse ; pedicels filiform, 

 2-4 times as long as the minute floral leaves ; calyx-teeth. 

 minute, obtuse ; corolla ^' long, pale purple or white. Un- 

 like the other species, this remains unchanged in drying. 



CASTILLEIA, L. 



Calyx tubular, compressed, cleft at the summit, the lobes 

 entire or 2-cleft ; tube of the corolla included in the calyx ; 

 the upper lip long, narrow, curved, laterally compressed, 

 and inclosing the four didynamous stamens; the lower 

 lip short, 3-lobed ; anther-cells oblong-linear, unequal, the 

 outer one fixed by the middle, the inner pendulous ; cap- 

 sule loculicidal, many-seeded. — Herbs, with alternate en- 

 tire or incisely lobed leaves, the uppermost colored ; flowers 

 in leafy spikes or racemes. 



C. cocciNEA, Spreng. Stem hairy ; radical leaves clus- 

 tered, nearly entire; those of the stem pinnatifld, with the 



