304 BORAGINACEAE. 



2. P. linearis (R. & P.) DC. Stems slender, diffusely branched 

 from the base, decumbent or ascending, canescent throughout 

 with appressed hairs, the leaves with spreading hairs; nutlets 

 oblong, 4 mm. long, becoming recurved, the winged margins toothed, 

 the teeth ending in an uncinate bristle, the apex thickly beset with 

 slender uncinate bristles. 



Frequent on the mesas in the coast valleys and in moist places 

 in the interior region. 



3. P. setosa Gray. Stems erect, 4-6 cm. high, yellowish green, 

 canescent with appressed hairs; calyx with a few strong hispid 

 hairs; nutlets broad, about 1 mm. long, beset on the margins and 

 inner surface with uncinate bristles. 



First collected on the Mojave Desert. Common on the desert 

 slopes of the San Gabriel, San Bernardino and Cuyamaca Moun- 

 tains. 



3. ALLOCARYA Greene. 



Mostly low spreading annuals, with linear entire 

 leaves, the lowest opposite, and small flowers in terminal 

 spikes or racemes. Pedicels thickened at the summit and 

 persistent. Calyx 5-divided, persistent, the segments 

 narrow. Corolla salver-shaped, white, yellow in the 

 throat. Stamens included. Ovary 4-divided; style 

 short. Nutlets crustaceous, smooth or rough, attached 

 at their bases or below the middle to the receptacle, the 

 scar of the attachment concave or raised. 



1. A. trachycarpa (Gray) Greene. Stem branching from the 

 base, decumbent, 3 dm. long or less, rough with a rather coarse and 

 somewhat spreading pubescence; racemes leafy almost throughout; 

 segments of the calyx linear, widely spreading; corolla very small; 

 nutlets ovate, straight, carinate on both sides, the dorsal keels and 

 nearly straight transverse rugae dentate-interrupted; scar sub- 

 orbicular, nearly basal. 



In low ground near Inglewood. 



4. EREMOCARYA Greene. 



HIrsute-canescent low annuals with numerous leafy- 

 bracted racemose branches. Roots imparting a purple 

 stain. Leaves in a basal rosulate tuft. Racemes dense, 

 biserial, leafy-bracted ; pedicels filiform, short and per- 

 sistent with the calyx. Calyx 5-parted to the base, 

 campanulate in fruit, its lobes nerveless, not bristly. 

 Corollas small, white. Nutlets neither margined nor 

 carinate, erect, attached for their whole length, the 

 groove open, slightly dilated and not furcate at base. 

 Style enlarged in fruit and persistent. 



