282 CONVOLVULACEAE. 



inflexcd membrane; winged, the wings broadened below 

 the middle, pollen-masses solitary in each sac, pendulous 

 on their caudicles. Stigma nearly flat, 5-angled or 

 5-lobed. Follicles usually thick, acuminate. Seeds usu- 

 ally comose. 



1. A. eriocarpa Benth. Erect, 5-8 dm. high; densely floccose- 

 woolly, the loose wool hardly deciduous except from the angled 

 stem below; leaves not rarely ternate and the uppermost alter- 

 nate, elongated-oblong or the upper lanceolate, obtuse or subcordate 

 at base, short-petioled, 10-20 cm. long; umbels few or several, on 

 stout peduncles; flowers dull white; corolla at first woolly outside; 

 the lobes longer than the pedicels; column short but distinct; hoods 

 shorter than the anthers, rather spreading, ventricose, semiorbicular 

 in outline and open round to near the middle of the back, the summits 

 produced inwardly into an acute angle or tooth barely enclosing the 

 filiform acute horn; ovaries glabrous, the summit of the styles villous; 

 follicles more or less woolly. 



Frequent on dry mesas and in the foothills, also occasionally in 

 the pine belt of the San Gabriel Mountains. 



2. A. mexicana Cav. Stems 6-12 dm. high, glabrous or sparsely 

 puberulent; leaves in whorls of 3-6 or the lower and uppermost 

 opposite, linear to linear-lanceolate, 6-15 cm. long, 4-12 mm. 

 broad, short-petioled; umbels many, corymbose, densely many- 

 flowered, on peduncles longer than the pedicels; flowers greenish- 

 white; corolla-lobes 4 mm. long; hoods broadly ovate, entire, shorter 

 than the anthers, exceeded by the stout subulate incurved horn. 



Frequent on the mesas and in the foothills. 



Family 86. CONVOLVULACEAE. Morning- 

 glory Family. 



Herbs (some tropical species shrubs or trees), the 

 stems twining or ascending, trailing or erect, with alter- 

 nate exstipulate leaves and regular perfect axillary, 

 cymose or solitary flowers. Calyx 5-parted or 5-divided, 

 usually persistent, the segments imbricated. Corolla 

 often funnelform or campanulate, the limb 5-angled, 

 5-lobed or entire. Stamens 5, inserted low down on the 

 tube of the corolla and alternate with its lobes; anthers 

 2-celled, longitudinally dehiscent. Ovary superior, ses- 

 sile, 2-3-celled, with 2 ovules in each cell, entire or 2-4- 

 divided; styles 1-3. Fruit a 2-4-valved capsule or of 

 2-4 distinct carpels. Seeds erect, villous, pubescent or 

 glabrous; embryo plaited or crumpled. 



