Part 1, 1907] OXALIDACEAE 



Styles pubescent ; blades of the leaflets sharply notched. 

 Bulb-scales several-many -ribbed. 



Shorter filaments glabrous ; petals 15-20 mm. long'; cap- 

 sules columnar. 16. l.jaliscana. 

 Shorter filaments pubescent ; petals 8-11 mm. long ; cap- 

 sules oblong. 17. /. Painieri. 

 Bulb-scales 3-ribbed. 18. I. tri.mv.ris. 

 Longer filaments unappendaged. 

 Blades of the leaflets not lobed. 



Shorter and longer filaments pubescent. 



Blades of the leaflets spatulate or obovate ; sepals linear to 

 linear-lanceolate, tubercles 2. 



Corolla violet. 19. I. Hemandesii 



Corolla white. 20. /. macilenta. 



Blades of the leaflets elliptic or elliptic-lanceolate ; sepals 

 oblong; tubercles 4. 21. /. Trienlalis. 



Shorter filaments glabrous. 



Blades of the leaflets narrowly linear ; sepals 3—1 mm. long. 22. /. tenuissima. 

 Blades of the leaflets lanceolate, oblong or obovate ; sepals 5-6 



mm. long. 23. /. lanceolata. 



Blades of the leaflets lobed at the apex. 



Corolla white ; blades of the leaflets obdeltoid in outline. 24. /. divergens. 



Corolla violet; blades of the leaflets cuneate (broadly so, or some- 

 times obdeltoid in outline in /. Grayi) to linear. 

 Lobes of the leaflets shorter than the body. 



Sepals glabrous, except sometimes for a tuft of hairs at the 

 apex. 

 Sepals 4.5-5.5 mm. long ; petals 14-19 mm. long ; tubercles 



of the sepals entire. 25. /. Grayi. 



Sepals 3-3.5 mm. long ; petals 7-9 mm. long ; tubercles of 

 the sepals deeply 2-lobed at the base. 26. /. dccaphylla. 



Sepals glandular-pubescent. 27. I.furcata. 



Lobes of the leaflets longer than the body. 28. I. confusa. 



Leaf-blades 3-foliolate. 



Filaments appendaged on the back. 



Sepals with 2, rarely partially confluent, apical tubercles. 

 Corolla white. 



Longer filaments pubescent; blades of the leaflets lunate, 

 sometimes broadly so. 

 Cymes mostly 2-flowered ; petioles glabrous or nearly so. 29. /. lunulaia. 

 Cymes many-flowered ; petioles closely pubescent. 30. /. calcaria. 



Longer filaments glabrous; blades of the leaflets broadly 

 cuneate. 31. /. rupestris. 



Corolla violet, purple or blue. 



Blades of the leaflets lunate or crescentic. 



Ovary stipitate. 32. /. slipilata. 



Ovary sessile. 



Sepals broadly linear to lanceolate, 3.5-4 mm. long ; lobes 



of the leaflets short. 33. I. bipartite. 



Sepals oblong to oblong-ovate, 2.5-3 mm. long; lobes of 

 the leaflets elongate. 34. /. tenuitoba. 



Blades of the leaflets obcordate, obreniform, obdeltoid or cune- 

 ate in outline. 

 Bulb-scales 3-ribbed. 



Blades of the leaflets obreniform in outline, those of the 

 lateral ones essentially equilateral. 

 Sepal-tubercles distinct, long. 



Sepals 4-5 mm. long, the tubercles rounded at the 



base. 35. I. discolor. 



Sepals6-7 mm. long, the tubercles lobed at the base. 36. /. obliqua. 

 Sepal-tubercles confluent, short. 



Blades of the leaflets sharply and rather deeply 

 notched ; capsule oblong, over twice as long as 

 the sepals. 37. /. madrensis. 



Blades of the leaflets emarginate or retuse ; cap- 

 sules globose-ovoid, slightly longer than the 

 sepals. 62. /. violacea. 



Blades of the leaflets cuneate, those of the lateral ones 

 very inequilateral ; tubercles of the sepals short. 38. /. stolonifera. 



Bulb-scales several-many-ribbed. 



Sepals obtuse ; blades of the leaflets prominently lobed. 

 Lobes of the leaflets directed outward. 



Longer filaments pubescent, shorter ones glabrous ; 

 blades of the leaflets shallowly notched. 

 Blades of the leaflets much wider than long, ob- 

 reniform in outline ; sepal-tubercles large, ob- 

 long. 39. /. vallicola. 

 Blades of the leaflets about as long as wide, ob- 

 deltoid in outline ; sepal-tubercles mostly lin- 

 ear. 40. /. Metcalfei. 



