330 Boraginaceae 



along the stems and branches. Calyx deeply 5-cleft, 

 spreading or reflexed in fruit, persistent. Corolla with 

 a circle of processes or crests which almost close the 

 throat. Stamens included. Nutlets flat, thin, radiately 

 divergent, bordered at apex or all around with a row of 

 hooked bristles. 



1. 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. 



2. P. penicillata (H. & A.) DC. Closely resembling the last 

 in habit, usually smaller and densely canescent with appressed 

 hairs throughout ; nutlets oblong, 2 mm. long, the apex covered 

 with slender uncinate bristles, the winged margin entire, in- 

 curved, somewhat broader at the base and sometimes bearing 1 

 or 2 uncinate bristles. 



Common in all our valleys and foothills, mostly in dry ground. 



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 mar- 

 gins 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 Mountains. 



3. ALLOCABYA 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 seg- 

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

 the throat. Stamens included. Ovary 4-divided ; style 

 short. Nutlets crustaceous, smooth or rough, attached 



