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 N. Austinae Eastw. Canons: Ida. Son. 31. 



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 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-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-crenat e to twice pinnatifid. 



Plant annual 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. GLANDULOSAE. 



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



III. RAMOSISSIMAE. 

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



corolla. IV. LINEARES. 



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

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



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



or crenately lobed. VI. PULCHELLAE. 



Seeds strongly corrugated transversely; leaves pinnately divided. 



VII. BICOLORES. 

 I. HETEROPHYLLAE. 



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 white, 



45 mm. long. 2. P. Burkei. 



Plant not densely canescent. 



Pubescence of 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-fourths 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; 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 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. GLANDULOSAE. 



Corolla-lobes entire or merely sinuate-crenate. 



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



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



9. P. Palmeri. 



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

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



Stem-leaves not suborbicular. 



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



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



Leaves pinnately divided to the midrib. 



Leaves densely hirsute or pilose, only slightly glandular; plant low, 12.5 dm. 



high, often naked above. 

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



stem and petioles glandular. 13. P. crenulata. 



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. 



