506 HYDROPHYLLACEJ?. Phaceliu. 



once or twice 2-forke(l or 2 - 4-rayed cyme, shoit-pedicelled : corolla purplish. — 

 Gray, Proc. Am. Acad. vii. 401, & x. 316. JVama syslyla. Gray, 1. c. vi. 37. 



Not rare in sliailed ami wooded ravines in the Sierra Nevada, at the elevation of 4,000 to 5,000 

 feet, from the Yosemite to I'laeer Co. Corolla less than half an inch long. Tliis interesting genus 

 was dedicated by Dr. Toiicy to the ilistinguished Trofessor Diaper of New York. 



5. PHACELIA, Juss. 



Calyx deeply 5-parted ; the divisions usually narrow and similar. Corolla from 

 almost rotate to narrow-funnelform, deciduous, commonly with appendages upon the 

 inside of the tube in the I'orni of 10 vertical plates or lamellnj ap[)roximate in |)air3 

 between the buses oi" the tiluments, or else udnato more or less to their base one on 

 each side. IStamens ctpiuily inserted low down or at the base of the corolla. Ovules 

 and seeds from 4 (a pair to each placenta) to very numerous. — Herbs, mostly 

 branched from the base ; with simple or compound alternate leaves, or tlie lower 

 opposite, and more or less scorpioid spicate or racemose cyraose inflorescence. Co- 

 rolla blue, violet, purple, or white, never yellow, except sometimes the tube or 

 throat. 



As now received (see Proc. Am. Acad. x. 316), this genus comprises nearly half the order, viz. 

 al)OUt 50 N. American species and two or three of Mexico and Chili. One, the earliest-described 

 species, is common to the two continents and ranges almost throughout their length. The genus 

 is mainly western, and is largely icpresented in California and along its borders. 



§ 1. Ovules and seeds only 4, a pair to each placenta. — Eupiiacelia, Gray. 



* Lower leaves opposite : spikes or branches of the cyme hardly at all coiling (or scor- 

 pioid), destitute of hispid or hirsute hairs : corolla-appendages at base of Jildinent 

 short. 



1. P. namatoides, Gray. Annual, barely a span high, with opposite ascending 

 bmnchcs, glulinuiM luid glaucitus below, glandular-pubescent above : loaves nar- 

 rowly lance(ilut((, (".nliru, tuj)ering into an obscure petiole, opjwsite or nearly so ; the 

 upi)ermost only alternate, e(pialling or surpassing the rather loose cyme or its si)ike- 

 like divisions : corolla narrow-campanulate, blue, a little longer than the calyx : 

 stamens and at length deeply 2-parted style included. — Proc. Am. Acad. x. 31G. 

 Nama racemosa, Kellogg, Proc. Acad. Calif, v. 51. 



Wooded region of the Sierra Nevada, from Calaveras grove to Summit Station, liolander, 

 Kelloijg. Corolla and globular capsule each only a lino or so long. Seeds alveolate-reticulated. 

 A gciuiine Phacelia in sti ucture, with the aspect of lYaiiia. 



* * Leaves all but the very earliest alternate (as in the genus generally) : 2)ubescence 

 or some of it hisjrid or hirsute, especially the inflorescence of spikes conspicuously 

 coiled in the bud, and mostly in jxiirs or cymose-clustered : internal appendages 

 of the corolla manifest, and more or less united with the base of the fl laments. 



+■ Leaves either simpde and entire, or vrith a pair or two of siynilar and smaller leaf- 

 lets or lobes : capsule ovate, acute. 



2. P. circinata, Jac(i. f. A span to 2 feet high from a perennial or biennial 

 stout root, hispid, uud the foliage strigose, either green, grayish, or canescent with a 

 sottish pubescence : leaves varying from lanceolate to ovate, acute, oblicjuely and 

 simply straight-veined ; tlie lower tapering into a petiole and some of them more 

 commonly bearing one or two pairs of lateral leaflets : inflorescence hispid ; the 

 dense spikes tbyr.soid and crowded : corolla whitish or bluish, moderately 5-lobed, 

 longer than the linear or oblong-lanceolate calyx-lobes : tilanients much exserted, 

 sparingly bearded. — Eclog. i. 135, t. 91 ; A. DC. Prodr. ix. 298. P. heterophylla, 

 Pursh. P. Californica, Cham. 



