GERANIUM FAMILY 149 



Pedicels not glandular-pubescent; style-column rarely so. 



Basal leaves 4-6 cm. broad; middle division broadly spatulate, 

 3-lobed; lobes notched; sepals over 1 cm. long. 



17. G. Cowenii. 

 Basal leaves 2-3 cm. broad; middle division cuneate, 3-toothed at 

 the ape.x; sepals less than 1 cm. long. IS. G. marginale. 



Petals narrowly obovate or oblong, dark purple. 19. G. atropurpureum. 



2. ERODIUM L'Her. Storkbill, Alfil.^ri.^, Pin Clover, Fil.\ree. 



1. E. cicutarium. 



Family 67. OXALIDACEAE. Wood-sorrel Family. 



Acaulescent herbs, with bulb-like rootstocks; petals violet or purple. 1. Ionoxalis. 

 Caulescent plants, with slender horizontal rootstocks or with an annual taproot; petals 

 yellow. 2. Xanthoxalis. 



1. IONOXALIS Small. Violet Wood-sorrel. i. /. violacea. 



2. XANTHOXALIS Small. Yellow Wood-sorrel. 



stem appressed-pubescent; capsule pubescent. 1. X. stricta. 



Stem loosely pubescent, or nearly glabrous; capsule glabrous. 2. X. Bushii. 



Family 68. LINACEAE. Flax Family. 



stigmas introrse and more or less elongate; sepals glandless; flowers in ours blue, rarely 

 wliite. 1. LiNX-M. 



Stigmas terminal and capitate; sepals, at least the inner ones, with marginal glands; 

 flowers in ours yellow. 2. Cathartolinxtm . 



1. LINUM L. Fl.\x, Blue Flax. 



Inner sepals ciliate; stigmas much elongate; introduced annual. 1. L. usitatissimum • 



Sepals not ciliate; stigmas rather short; native perennials. 



Sepals over 5 mm. long at maturity, more than one-half as long as the capsule. 



2. L. Lewisii. 

 Sepals less than 5 mm. long, less than one-half as long as the capsule. 



3. L. pratense. 



2. CATHARTOLINUM Reichenb. Yellow Flax. 



Styles distinct; capsules without cartilaginous thickenings at the bases of the sepals; 

 sepals ovate, scarcely as long as the capstile; leaves oblong or oblong-linear; flowers 

 in fastigiate cymes. 

 Outer sepals obtuse or merely acutish at maturity; capsule 3 mm. long. 



1. C. sedoides. 

 Outer sepais acuminate at maturity; capsule 4 mm. long. 2. C. Kingii. 



Styles more or less vmited; capsiile with cartilaginous thickenings at the base of the sepalf ; 

 sepals lanceolate, much exceeding the capsule; leaves linear-lanceolate to subulate. 

 Outer sepals copiously gland-toothed ; staminodia none or entire. 



Stem, branches, and pedicels densely puberulent. 3. C. puberulum. 



Stem, branches, and pedicels not densely puberulent, usually glabrous. 



Sepals not more than half longer than the capsule, the inner ones with rela- 

 tively coarse and conspicuously gland-tipped teeth. 

 Petals 5-9 mm. long. 



Outer sepals with lateral ribs faint near the base; branches blunt-angled. 



4. C. australe. 

 Outer sepals with lateral ribs prominent throughout; branches wing- 

 angled. 5. C. compactum. 

 Petals 10-20 mm. long. 



False septa of the capsule slightly thickened; sepals becoming 6-8 mm. 



long; petals 11-15 mm. long. 6. C. rigidum. 



False septa thickened half their width; sepals becoming 9-11 mm. long; 

 petals 17-20 mm. long. 7. C. Berlandieri. 



Sepais twice as long as the capsule, long-acuminate, aristate, the inner ones 

 with very numerous, flue, inconspicuously gland-tipped teeth. 



8. C. aristatum. 

 Outer sepals entire or with few scattered teeth; staminodia 2-lobed. 



9. C. subteres. 



Family 69. BALSAMINACEAE. Jewel-weed Family. 



1. IMPATIENS L. Touch-me-not, Jewel-weed. 

 Spur present. 



Spur porrect, i. e., bent at a right angle to the sack, one-fourth as long as the same or 

 less; sack as broad as long, pale yellow, unspotted or minutely so. 



1. /. pallida. 

 Spur strongly incurved, one-third as long as the sack or more; sack longer than broad. 

 Sack at least two-thirds as broad as long, abruptly contracted into tlie spur; flowers 

 orange or pinkish, with large spots or rarely unspotted. 2. /. hiflora. 



