384 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
of 5 herbaceous sepals; petals rose or yellow; stamens 10, the filaments united at the 
base; pistil of 5 united carpels; fruit a capsule, the seeds transversely wrinkled. 
KEY TO THE GENERA. 
Plants acaulescent, with tuberous roots; flowers rose to 
almost violet..........---2.- 2-2 cece eee eee eee eee 1. IoNoXALIS (p. 384). 
Plants caulescent, rhizomatous, sometimes with tubers; 
flowers yellow.........-.-.---- 22 eee eee eee eee eee 2, XANTHOXALIS (p. 385). 
1. IONOXALIS Small. VioLeT woop-sorREL. 
Perennial acaulescent herbs with leaves and scapes rising from scaly bulbs; petioles 
elongated; leaf blades palmately 3 to several-foliolate, the leaflets narrowly to broadly 
obcordate, with cuneate bases; flowers in bracted cymose clusters terminating long 
slender weak scapelike peduncles, usually not very numerous; sepals 5, each with 
apical tubercles; stamens 10, the filaments united at the base; capsules erect. 
KEY TO THE SPECIES. 
Leaves with 4 to several leaflets. 
Leaflets as broad as long or broader; plants 8 cm. high or less.... 1. I. caerulea. 
Leaflets much longer than broad; plants more than 8cm. high.. 2. J. grayi. 
Leaflets 3. 
Filaments appendaged on the back. 
Longer filaments pubescent, the shorter ones glabrous; 
leaflets shallowly notched.............-..---+-eeeeee 3. I. metcal fer. 
All filaments pubescent; leaflets deeply notched.......... 4. I. amplifolia. 
Filaments not appendaged. 
Tubercles of the sepals distinct............ce eee cece eee eee 5. I. monticola. 
Tubercles confluent at the tips..............-..-. 22 eee eee 6. I. violacea. 
1. Ionoxalis caerulea Small, N. Amer. Fl. 25: 33. 1907. 
TyrE Locauiry: Lincoln County, New Mexico. Type collected by Miss Josephine 
Skehan (no. 112). 
Ranae: Known only from the type locality, in the Transition Zone. 
2. Ionoxalis grayi Rose, Contr. U. 8. Nat. Herb. 10: 112. 1906. 
Oxalis decapetala H. B. K. err. det. A. Gray, Pl. Wright. 2: 25. 1853. 
Type LocALity: Copper Mines, New Mexico. Type collected by Wright in 1851. 
Ranae: New Mexico and northern Mexico. 
New Mexico: West Fork of the Gila; James Canyon. Damp woods and canyons, 
in the Transition Zone. 
8. Ionoxalis metcalfei Small, N. Amer. Fl. 25: 39. 1907. 
Type Locauity: Mogollon Mountains, Socorro County, New Mexico. Type col- 
lected by Metcalfe (no. 299). 
Rance: Southwestern New Mexico. 
New Mexico: Mogollon Creek; Burro Mountains. Transition Zone. 
4. Ionoxalis amplifolia (Trel.) Rose, Contr. U. 8S. Nat. Herb. 10: 110. 1906. 
Oxalis latifolia H. B. K. err. det. Trel. Mem. Bost. Soc. Nat. Hist. 4: 91. pl. 17. 
f. 12. 1888. 
Oxalis divergens amplifolia Trel. in A. Gray, Syn. Fl. 1': 368. 1897, 
TyPE Loca.iry: Arizona. 
Rance: Western Texas to Arizona. 
