78 gentiaxacejE. 



Hooda with hom-like pro6es8 within S 



Hoods cleft at the back (outside), hornlesa 8 



Hoods cleft on the inside, hornless 4k 



1. PHIIiBEETIA, HBK. 



1. P. linearis, var. heterophylla. Or. Corolla 6 lines broad, dQU.oolored. S. CaL 



2. ASCLEPIAS, Linnffius. 



CoroIla-IobeB 4 or 6 lines long: hoods 5 or 6 lines long, back prolonged 1 



Corolla-lobes whitish, 3 lines long: hoods truncate; horns little exserted 2 



Corolla-lobes greenish, 3 or 4 lines long: hoods appendaged on sides 3 



Corolla-lobes whitish, ovate, 3 lines long , 4 



Corolla-lobes greenish or purplish, 3 lines long; horns triangular, obtuse 6 



Corolla-lobes greenish or purplish, 2 lines long: horns slender, exserted 6 



1. A. speciosa, Torr. Stout, 2 to 6 ft. high: follicles with soft spines. 



2. A. Fremonti, Torr. A foot high or less: short- woolly: leaves obtuse. 



3. A. erosa, Torr. Leaves ovate or narrower, acuminate, margins scarious. 



4. A. eriooarpa, Benth. Densely woolly: leaves often in 3's, 4 to 8 inches long. 



5. A. vestita, H. & A. Dense white wool deciduous in age: leaves very acute, long. 



6. A. BEexioana, Car. Smooth; slender leaves in whorls, 3 to 6 inches long. 



3. SCHIZKrOXUS, Gray. 

 1. S. ptirpiurasoens, Gr. Decumbent or prostrate: leaves cordate: corolla reddish. 



4. GOMPHOCARPTJS, Robt. Brown. 



1. G. cordifolius, Benth. Smooth: loosely flowered: corolla dark purple-red. 



2, G. tomentosus, Gr. Woolly: stem angled: corolla greenish or purplish. 



gentianacej:. 



Corolla from fannelform to salverform: leaves opposite. 



Corolla yellow, 4-lobod: anthers not twisted 1 



•V^orolla red, 3-5-lobed: anthers spirally t^J^isted in age j ... . S 



Corolla l;)lue or white: stigma flat, nearly sessile 8 



OoroUa rotate, 4-parted with fringed glands: leaves opposite or whorled 4 



voroUa campanulate: leaves alternate or radical, 3-f oliolate or reniform C 



1. MICROCALA, Link. 

 I. M. quadrangularis, Oriseb. Slender, 2 or 3 inches high; calyx 4-angl8d. 



