762 



FLORA. 



i. Collomia linearis Nutt. NARROW-LEAVED COLLOMIA. (I. F. f. 2994.) 

 Annual, viscid-puberulent; stem 0.7-4.5 dm. high. Leaves linear-oblong, 

 lanceolate or linear-lanceolate, entire, acuminate, sessile, or the lower short- 

 petioled, 2-6 cm. long; flowers 10-15 mm< l n g> * n capitate leafy-bracted 

 clusters; calyx-lobes triangular-lanceolate, acute; corolla light purple or nearly 

 white, the tube slender, longer than the calyx, the lobes 2-4 mm. long ; capsule 

 about as long as the calyx. In dry soil, Manitoba to Minn., Neb., Br. Col., Ariz, 

 and Cal. Also in N. Y. and N. B. May-Aug. 



5. NAVARRETIA R. & P. 



Annual herbs, with alternate spinose-pinnatifid leaves, or the lowest entire, and 

 small flowers in dense terminal bracted clusters. Calyx prismatic or obpyramidal, 

 the tube 5 -angled, 5 -cleft, not accrescent, not distended by the ripening capsule, 

 the sinuses scarious, the lobes spiny-tipped, often toothed. Corolla tubular-funnel- 

 form or salverform, 5-lobed. Stamens equally inserted in or below the throat of 

 the corolla. Ovary 2-3-celled. Capsule i-3-celled. Seeds mostly mucilaginous 

 and emitting spiral threads when wetted. [In honor of Navarrete, a Spanish 

 physician.] About 24 species, natives of western Am. Besides the following, 

 some 22 others occur in the western U. S. 



i. Navarretia minima Nutt. SMALL NAVARRETIA. (I. F. f. 2995.) De- 

 pressed, tufted, somewhat pubescent; stem 2-8 cm. high. Leaves sessile, 1-2.5 cm - 

 long, i-2-pinnatifid into almost filiform acicular segments; flowers about 4 mm. long, 

 white (?); calyx-lobes awl-shaped, mostly toothed, about as long as the tube; the 

 sinuses more or less white-pubescent; calyx-tube about equalling the indehis- 

 cent i-6-seeded capsule. In dry soil, Neb. and S. Dak. to Wash, and Ariz. 

 Summer. 



Family 4. HYDROPHYLLACEAE Lindl. 

 Water-leaf Family. 



Herbs, mostly hirsute, pubescent or scabrous, with alternate or basal, 

 rarely opposite leaves, and perfect regular 5-parted flowers, in scorpioid 

 cymes, spikes or racemes, or rarely solitary. Calyx inferior, deeply 

 cleft or divided. Corolla gamopetalous. Stamens 5, inserted on the 

 corolla, and alternate with its lobes ; filaments filiform ; anthers mostly 

 versatile, 2-celled, the sacs longitudinally dehiscent. Disk annular, or 

 none. Ovary superior, 2-celled, or i-celled with 2 placentae ; styles 2, 

 separate, or partly united ; stigmas small, terminal; ovules anatropous 

 or amphitropous. Capsule i-2-celled, mostly loculicidally 2-valved. 

 Seeds usually pitted, rugose or reticulated ; endosperm fleshy or cartilag- 

 inous; embryo small ; cotyledons half-terete or plano-convex. About 

 17 genera and 160 species, mostly natives of western N. Am. 



Styles united below; ovary i-celled; leaves mostly lobed or dentate. 

 Corolla-lobes convolute in the bud; placentae dilated. 



Stamens exserted. i. Hydrophyllum. 



Stamens not exserted. 



Sinuses of the calyx appendaged. 2. Nemophila. 



Calyx much enlarged in fruit, its sinuses not appendaged. 



3. Macrocalyx. 



Corolla-lobes imbricated in the bud; placentae narrow. 4. Phacelia* 



Styles distinct to the base; ovary 2-celled; leaves antire. 5. Nama. 



i. HYDROPHYLLUM L. 



Perennial or biennial herbs, with large lobed pinnatifid or pinnately divided 

 leaves, and white, blue or purple flowers, in more or less scorpioid cymes. Calyx 

 deeply 5-parted, the segments lanceolate or subulate. Corolla tubular-campanu- 

 late or campanulate, 5-lobed, the lobes convolute in the bud, each with a linear append- 

 age within, which extends to the base of the corolla and is incurved into a groove. 

 Stamens 5, exserted; filaments pilose below or at the base; anthers versatile. 

 Ovary i-celled, hispid-pubescent; placentae fleshy, dilated, free from the ovary-wall 

 except at the top and bottom, each enclosing 2 ovules; styles united nearly to the 



