306 BORAGINACEAE. 



1. P. canescens Benth. Stems much branched from the base, 

 decumbent or ascending, 2-4 dm. long; pubescence pale, soft-villous; 

 calyx cleft nearly to the base, the segments broadly lanceolate, 

 4-6 mm. long in fruit; nutlets 2 mm, long, incurved-connivent, 

 rugose-reticulate, the areola longer transversely, the lateral angles 

 very distinct. 



Frequent in grassy places in interior valleys and foothills. 



2. P. nothofulvus Gray. Stems 1-several from the depressed 

 rosulate tuft of leaves, erect or suberect, 3-6 dm. high, branching 

 mostly above, silky-villous, the hairs reddish when young, espe- 

 cially on the calyx; leaves oblong-obovate or oblanceolate; spikes 

 leafless; calyx cleft only to the middle, 3 mm. long in fruit, circum- 

 scissile below the middle; nutlets with dot-like granulations between 

 the rather prominent rugae. 



Frequent on rather moist grassy hillsides about Los Angeles and 

 on mesas in the coast region. 



3. P. cooperi Gray. Diffusely branched from the base with 

 slender sparsely-leaved ascending flowering stems, 1.5-3 dm. long, 

 hispidulous; leaves spatulate-linear to oblong-lanceolate; spikes 

 at length sparsely-flowered, sparingly bracteate or above bractless; 

 corolla-limb 4-6 mm. broad; nutlets trigonous and reticulate-rugose, 

 dentate-muriculate on the reticulations. 



Occasional on moist grassy slopes in the coast valleys. 



7. CRYPTANTHA Lehm. 



Mostly low erect branching setose or hispid annual 

 herbs, with narrow alternate entire leaves, and small 

 mostly white flowers, in scorpioid bractless or bracteolate 

 spikes. Calyx 5-parted or 5-cleft, at length deciduous, 

 erect or spreading in fruit. Corolla small, funnelform, 

 usually with 5 scales closing the throat. Stamens in- 

 cluded; filaments short. Ovary 4-divided; style short; 

 stigma capitate. Nutlets erect, rounded on the back, the 

 margins obtuse acute or winged, attached laterally to 

 the conic or elongated receptacle, scar elongated. 



Nutlets muricate. 



Calyx-lobes but little exceeding the nutlets 



in fruit. 1. C. muriculata. 



Calyx-lobes about twice the length of the 

 nutlets in fruit. 

 Nutlets strongly muricate, gray. 



Corolla about 6 mm. broad; sepals 



6-8 mm. long in fruit. 2. C. harhigera. 



Corolla less than 4 mm. broad; sepals 



3-5 mm. long in fruit. 3. C. intermedia. 



Nutlets faintly and sparsely muricate, 



brown. 4. C ambigua. 



Nutlets smooth and shining. 



