702 HYDROPHYLLACEAE 



cm. long; appendages of the calyx small, oblong; lobes ovate, short-ciliate ; corolla 

 barely exceeding the calyx; lobes oval; seeds obscurely pitted. Perhaps the 

 same as A^ Austinae Eastw. Canons: Ida. Son. Jl. 



5. PHACELIA Juss. Scorpion Weed. 



Perennial or annual caulescent herbs. Leaves alternate or opposite below. 

 Flowers perfect, in scorpioid racemes or cymes. Calyx slightly enlarging in 

 fruit, 5-lobed, without appendages. Corolla white, purple, or blue; tube ap- 

 pendaged within; lobes 5, imbricate. Stamens 5; filaments adnate to the tube 

 of the corolla. Ovary l-celled, with two narrow placentae attached to the walls 

 of the ovary; stj'les 2-cleft; ovules two to many on each placenta. Capsule 

 l-celled or falsely 2-celled, 2-valved. Seeds reticulate or roughened. 



Stamens equalling or usually much exceeding the corolla. 



Leaves all simple and entire, or some of the lower pinnately 3-5-divided, with entire 

 divisions; capsule acute; ovules 4. I. Heterophyllae. 



Leaves from sinuate-crenate to twice puinatifld. 



Plant amiual or in one species perhaps perennial, but not cespitose. 



Capsule globular-ovoid, obtuse; ovules 4; stamens in most species long-exserted. 

 Calyx-lobes oblong-spatulate to linear-oblanceolate, scarcely exceeding the 



capsule. II. Gl.\ndulosae. 



Calyx-lobes Unear to linear-oblanceolate, much exceeding the capsule. 



III. Ramosissimae. 

 Capsules ovoid, acute; ovules 12-40; stamens slightly if at all exceeding the 

 corolla. IV. LiNE.\RES. 



Plant perennial, cespitose; inflorescence spicate-thyrsiform. V. Sericeae. 

 Stamens shorter than the coroUa; plant low and diffuse; annuals. 



Seeds reticulate or favose-pitted, not transversely rugose; leaves long-petioled, entire 



or crenately lobed. VI. Pulchell.\e. 



Seeds strongly corrugated transversely; leaves pinnately divided. 



VII. Bicolores. 



I. HETEROPiri'LLAE. 



Plant perennial, or at least biennial. 

 Plant densely canescent. 



Calyx-lobes linear or linear-oblong; mid veins inconspicuous; corolla pink or pale 



lilac, about 6 mm. long. 1. P. leucophylla. 



Calyx-lobes narrowly Unear; midveins, at least in fruit, very strong; corolla white, 

 4-5 mm. long. 2. P. Burkei. 



Plant not densely canescent. 



Pubescence of the leaves of two kinds, long lilrsute hairs and a fine pilose or tomen- 

 tose pubescence. 

 Calyx almost as long as the wMte corolla, its lobes narrowly Unear, acute, 



with a strong midrib. 3. P. nervosa. 



Calyx much shorter than the corolla; midveins faint. 



Stem erect; calyx from two-tliirds to tlu'ee-foui'ths as long as the corolla. 

 Plant biennial or short-lived perennial; coroUa pink or lilac. 



4. P. biennis. 

 Plant a cespitose perennial; coroUa usuaUy white. 



5. P. helrrophylla. 

 Stem ascending, slender; inflorescence open; calyx about half as long as 



the pilose purplish corolla. 6. P. alpina. 



Pubescence of the leaves hirsute only; calyx-lobes narrowly linear; midrib weak; 

 corolla wliite. 7. P. leptosepala. 



Plant annual. 



Corolla 5-G mm. long; ovules 4. 8. P. humilis. 



CoroUa 8-10 mm. long; ovules 12-16. 24. P. linearis. 



II. Gl.andulosae. 

 CoroUa-lobes entire or merely sinuate-crenate. 



Leaves sinuate-crenate to lobed halfways to the midrib. 



Corolla narrowly campanulate; plant simple, strict, densely liirsute. 



9. P. Palme ri. 

 Corolla oi:)en-campanulate; plant branched, scarcely at all hirsute, v(!ry glandular. 

 Stem-leaves suborbicular, subcoi-date at the base. 10. P. orbicularis. 



Stem-leaves not suborbicular. 



Stem-leaves ovate, oval, or elliptic in outUne. 11. P. integrifolia. 



Stem-leav&s oblong in outline. 12. /'. corrugata. 



Leaves pinnately divided to the midrib. 



Leaves densely liirsute or pilose, only slightly glandular; plant low, 1-2.5 dm. 

 high, often naked above. 

 Leaves oblanceolate or spatulate in outline; calyx decidedly hirsutc-liispid; 



stem and petioles glandular. 13. P. crenulala. 



Leaves oblong or linear in outUne; calyx scarcely hispid, but densely glandular; 

 stem and petioles wliite-villous. 14. /-". deserta. 



Leaves liirsute only on the veins, short-pubescent and very viscid; plant stouter, 

 2-4 dm. high, branched. 



