Oxalidaceae novae mexicanae. 261 



pedregal at San Angel near the City of Mexico, which, from its appea- 

 rance and station, is more likely to belong here than any other which 



1 have seen. Cavanilles' figure shows a plant with 3 or 4 broad, obo- 

 vate leaflets and with elongated peduncles and slender pedicels, all of 

 which are possessed by my specimen. 



29. lonoxalis vespertilionis (Zucc.) Rose, 1. c, p. 115. 



Oxatis vespertilionis Zucc, Abh. Math. Phys., Classe, II, 350; 1834. 



30. Lotoxalis angustifolia (H. 8. K.) Rose, 1. c, p. 115. 

 Oxalis angustifolia H. B. K.. Nov. Gen. & Sp., V, 249; 1823. 



31. Lotoxalis dichotoma Rose, 1. c, p. 115. 



Woody for some distance below, slender, erect, rarely if at all 

 branching, somewhat hairy, 30 to 60 cm high; petioles slender, 2 to 

 7 cm long, somewhat pilose; leaflets orbicular to oblong, 2 to 4 cm long, 

 rounded at base and apex or sometimes obtuse, thin, more or less hairy 

 on both sides, paler beneath, the terminal leaflet remote; pedicels slender. 



2 to 7 cm long, longer than the subtending petiole, dichotomously 

 branching with a single flower in the fork, several-flowered; sepals 

 4 mm long, slightly hairy; petals yellow, twice as long as the sepals; 

 stamens glabrous. 



Type U. S. National Herbarium no. 300500, collected by J. N. Rose 

 in the foothills of the Sierra Madre, near Colomas, Sinaloa, July. 1897 

 (no. 1650). 



This species belongs to the group Hedysaroideae, and is closely 

 related to the so-called Oxalis septum. 



32. Lotoxalis fasciculata (Turcz.) Rose, 1. c, p. 115. 



Oxalis fasciculata Turcz., Bull. Soc. Nat. Mosc, XXXII 1 , 272; 1859. 



33. Lotoxalis glabrata (Baker) Rose, 1. c, p. 115. 

 Oxalis neaei glabrata Baker, Ref. Bot., V, pi. 292; 1871. 



34. Lotoxalis neaei (DC.) Rose, 1. c, p. 115. 

 Oxalis neaei DC, Prod., I, 690; 1824. 



35. Lotoxalis occidentalis Rose, 1. c, p. 115. 



Somewhat woody below, branching at base; branches angled, 

 glabrous; petioles usually hairy; leaflets three, glabrous throughout or 

 slightly ciliate, orbicular to narrowly oblong, obtuse or slightly retuse. 

 the upper leaflet somewhat remote; peduncles 2 to 2,5 cm long, longer 

 than the petioles; flowers in umbels of 3 or 4; buds ovate, acute; sepal 

 ovate, 5 mm long, acute, glabrous or nearly so; petals yellow; capsule 

 oblong, 6 to 8 mm long, smooth; cells 3-seeded. 



Type U. S. National Herbarium no. 302240, collected by J. N. Rose 

 on road between Rosario and Conception, Sinaloa, July 27, 1897 

 (no. 3265). 



36. Lotoxalis pentantha (Jacq.) Rose, 1. c, p. 116. 

 Oxalis pentantha Jacq., Oxal., 21, pi. 1; 1794. 



37. Lotoxalis psilotricha (Turcz.) Rose, 1. c, p. 116. 



Oxalis psilotricha Turcz., Bull. Soc. Nat. Mosc, XXXI 1 , 428; 1858. 



