HYDROPHYLLACEAE (WATERLEAF FAMILY) 407 



3. MACROCALYX Trew. 



Leaves pinnately parted or bi- or tripinnately dissected and the bractless 

 flowers in axillary peduncled racemes. Calyx without appendages at the 

 sinuses, and usually much enlarged under the fruit. Corolla white, cam- 

 panulate, shorter or little longer than the calyx, the internal appendages 

 minute or none. Ovules 4-8. Ellisia. 



1. Macrocalyx Nyctelea (L.) Kuntze, Rev. Gen. PL 434. 1891. Annual, 

 1-2 dm. high, at length very diffuse: leaves on naked or barely margined 

 petioles; the divisions 7-13, lanceolate, acute, mostly 1-3-toothed or lobed: 

 peduncles solitary in the forks or opposite the leaves, or some of the later 

 ones racemose and secund: calyx-lobes acuminate, longer than the capsule: 

 corolla rather shorter than the calyx. Colorado to the Saskatchewan, and 

 eastward across the continent. 



4. NEMOPHILA Nutt. 



Delicate low annuals. Leaves opposite, or the uppermost alternate, more 

 or less pinnate. Flowers solitary or inclined to be racemose. Calyx with a 

 reflexed appendage in each sinus, accrescent. Corolla rotate to broadly cam- 

 panulate, in all our species longer than the calyx, with 10 internal appendages 

 at base. Stamens shorter than the corolla, inserted near its base. Styles 

 more or less 2-cleft; ovules 4-20. 



1. Nemophila parviflora Dougl. Hook. Fl. 2: 79. 1840. Stems slender and 

 weak, trailing or procumbent: leaves pinnately lobed, parted, or divided into 

 3-5 lobes: calyx-appendages rather conspicuous, or sometimes almost none: 

 corolla white or whitish, 5-8 mm. in diameter, narrowly campanulate to al- 

 most rotate, the lobes longer than the tube; appendages adherent by one edge: 

 filaments inserted on the very base of the corolla: seeds 1-4, often deeply pitted. 

 From Western Wyoming to California and Washington. 



5. PHACELIA 



Annual, biennial, or rarely perennial mostly hirsute or hispid herbs, often 

 glandular, with entire or variously lobed or dissected leaves, and often showy 

 flowers in scorpioid spikes or racemes. Calyx deeply 5-parted. Corolla from 

 nearly rotate to campanulate, tubular or funnelform, deciduous, the tube 

 commonly with internal lamellate projections or appendages. Style 2-cleft. 

 Capsule 1-celled, 2-valved, the thin septa-like placentae adherent. 



Leaves simple and entire, or the lower more or less pinnate with en- 

 tire divisions. 



Annuals. 



Vernal and evanescent, diminutive; leaves ovate . . . 1. P. Knightii. 

 Aestival; leaves or their lobes linear-oblong . . . 2. P. linearis. 



Rather large and coarse perennials or biennials. 



White-can escent; stems clustered, assurgent . . . 3. P. leucophylla. 



Hispidly hirsute; stems mostly single, erect . . . 4. P. heterophylla. 



Leaves sinuate or crenate to bipinnatifid. 



Annuals or biennials. 



Leaves pinnately divided quite to the midrib. 

 Terminal divisions of the 



leaves distinctly larger than the 



lateral . 5. P. splendens. 



Terminal divisions of the leaves not larger than the lateral. 

 Ovules and seeds 4 or by abortion fewer. 



Canescent biennial, scarcely glandular . . . 6. P. deserta. 



Sordid-green glandular annuals. 



Corolla-lobes crenulate to erose-denticulate . 7. P. glandulosa. 



Corolla-lobes entire 8. P. neo-mexicana. 



Ovules and seeds several to numerous (8-40). 



Plants simple, or branched above, 2-3 dm. high . 9. P. Franklinii. 



Plants diffusely slender-branched from the base, low . 10. P. Ivesiana. 

 Leaves merely sinuately or crenately lobed. 



Leaves coarsely and sinuately lobed halfway to the midrib 11. P. corrugata. 

 Leaves finely and shallowly crenate 12. P. integrifolia, 



