240 APOCYNACE.E. 



2. F. Oregana, Nutt. Tree of fair dimensions: leaves tomentose, 

 or glabrate in age; leaflets 59, oval to oblong-lanceolate, entire, sessile, 

 2 4 in. long: fl. all with minute calyx and no petals; fr. marginless at 

 base, margined upwards into an oblanceolate or spatulate retuse wing, 

 the whole 11^ in. long. Marin and San Mateo counties. 



OBDER LXVII. APOCYNACE^E. 



Herbs with milky juice, opposite entire exstipulate leaves, and regular 

 5-merous flowers. Corolla-lobes convolute in bud. Stamens borne on 

 the corolla alternate with its lobes, anthers more or less coherent with 

 the stigma. Ovaries 2, both developing into long follicles filled with 

 flattish seeds usually bearing a tuft of silky down at the end. 



1. APOCYNUM, Matthiolus. Flowers small, in terminal cymes. 

 Calyx small, deeply 5-cleft. Corolla cylindric or campanulate, 5-lobed, 

 bearing within and toward the base 5 triangular- subulate appendages, 

 alternate with the stamens. Stamens on the base of the corolla; fila- 

 ments short, broad; anthers sagittate, acute. Stigma ovoid, obscurely 

 2-lobed. Follicles slender, terete. Seeds many, with long coma at apex. 



1. A. pumilum. Commonly pubescent, stoutish, seldom 1 ft. high, 

 with spreading branches from the base: lowest leaves subreniform to 

 j'ound-ovate, the others cordate-ovate and oval, commonly % in., seldom 

 more than 1 in. long: fl. solitary in the upper axils, and in short cymose 

 clusters at the ends of the branches: corolla subcylindric, 34 lines long; 

 oblong-lanceolate segments little spreading. -^Goiomon in the Mt. Diablo 

 Range and northward. Eeferred as a variety to A. androsaemifolium 

 hitherto, but wholly distinct in size and form of corolla, as well as in 

 other particulars. 



2. A. caiiiialriiiuiii, L. Herbage of a light almost yellowish green, 

 flaccid, glabrous: stem 24 ft. .high, erect, rather strict: leaves oblong, 

 2 3 in. long: fl. small, greenish, in small dense terminal cymes; corolla 

 little exceeding the lanceolate calyx-lobes. Frequent along streams, and 

 in low lands. June Aug. 



3. A. Yestituni. Allied to the last, but dwarfish, rather widely 

 branching, and densely soft-pubescent throughout: leaves all ovate- 

 lanceolate, 1 2 in. long: cymes ample and compound: corolla cylindric, 

 about twice the length of the lanceolate-subulate calyx-lobes, its segments 

 a third the length of the tube, little spreading. Hills west of Napa 

 Valley, in dry soil. July. 



2. PERVINCA, Tragus. Flowers large, solitary in the axils of the 

 leaves. Calyx 5 -par ted, with acuminate segments. Corolla with narrow- 

 funnelform tube, hairy and angular throat, and rotate limb. Stamens 5, 

 the inflexed anthers longer than the short filaments; these on the tube 



