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 cj^mes. 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 1-celled, with two narrow placentae attached to the walls 

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

 1-ceUed or falsely 2-ceHed, 2-valved. Seeds reticulate or roughened. 



Stamens equalling or usually much exceeding the corolla. 



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

 divisions; capsule acute; ovules 4. I. Heterophyll-IE. 



Leaves from .sinuate-crenate to twice pinnatifld. 



Plant annual or in one species perhaps perennial, taut not cespitose. 



Capsule glotaular-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 linear to Unear-oblanceolate, much exceeding the capsule. 



III. R.\MOSISSI\L\E. 



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

 corolla. IV. Li.ve.^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. Pulc'HELL.ie. 



Seeds strongly corrugated transversely; leaves pinnately di\'ided. 



VII. BiCOLORES. 



I. Heterophtllae. 



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 linear; midveins, at least in fruit, very strong; corolla wliite, 

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



Plant not densely canescent. 



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

 tose pubescence. 

 Calyx almost as long as the white corolla, its lobes narrowly Linear, acute, 



with a strong midrib. 3. P. nervosa. 



Calyx much shorter than the corolla; midveins faint. 



Stem erect; calyx from two-thirds to three-foui'ths as long as the corolla. 

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



4. P. biennis. 

 Plant a cespitose perennial; corolla usually white. 



5. P. heterophylla. 

 Stem ascending, slender; inflorescence open; caJj-x about half as long as 



the pilose piu'plish corolla. 6. P. alpina. 



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

 corolla white. 7. P. leptosepala. 



Plant annual. 



Corolla .5-6 mm. long; ovules 4. 8. P. humilis. 



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



II. Gl^ndulosae. 



CoroUa-lobes entire or merely sinuate-crenate. 



Leaves sinuate-crenate to lobed half ways to the midrib. 



CoroUa narrowly rampanulate; plant simple, strict, densely hirsute. 



9. P. Pahneri. 

 Corolla open-campanulate ; plant branched, scarcely at all liirsute, very glandular. 

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



Stem-leaves not suborbicular. 



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



Stem-leaves oblong in outline. 12. P. corrugala. 



Leaves pinnately divided to the midrib. 



Leaves densely hirsute or pilose, only sUghtly glandular; plant low, 1-2.5 dm. 

 high, often naked above. 

 Leaves oblanceolate or spatulate in outUne; calyx decidedly hirsute-hispid; 



stem and petioles glandular. 13. P. crenulala. 



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

 stem and petioles white- villous. 14. P. deserta. 



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

 2-4 dm. high, branched. , 



I 



