13.' 



This species is very distinct from any other of this genus with which 

 I am familiar. The excessive development of cork on some of the 

 younger branches is very peculiar. Dr. Palmer states that this cork 

 soon disappears and is not found on the older wood. 



Explanation of Plai 

 of ]iod showing seeds; fi 



—Fig- 1, flowering Lrauclilet; fig. 2, podj fig. 3, a part 

 4, a branch showing corky wings; scale of all §. 



Calliandra bijuga Rose, sp. now 



A tree with wide-spreading top and trunk 20 to 22.5 cm. in diam- 

 eter; branches with light gray bark, pubescent, soon becoming 

 glahrate; stipules ovate, acute; petiole wanting or only 12 mm. 

 long; rachis very short; pinnae 2 pairs; leaflets 9 to 12 pairs, oblong, 

 12 mm. long, acute, glabrous or nearly so, somewhat coriaceous, 

 shining above, paler beneath; peduncles axillary, single or in twos, 

 2.5 cm. long; dowers capitate, sessile; calyx 2 mm. long, glabrous, 

 hardly striate; carpels 6 mm. long; stamens 3.7 cm. long, bright 

 crimson; pod 10 cm. long. 12 mm. wide, somewhat puberulent. acute, 

 emirate at base, with very thick margins. 



In bottom lands at Acapulco; collected by Dr. Edward Palmer 

 November, 1894 (So. 138). 



A very handsome species, the crowded pinnae peculiar. This spe- 

 cies belongs to the section Nitidaeand the subsection Paucijugae. 

 Calliandra peninsularis Pose, sp. nov. 



Pinnae always 6 pairs, leaflets about 20 pairs; the leaflets 4 to 6 

 mm. long, midvein eccentric, a little pubescent, acute; peduncle 3.7 

 to 5 cm. long, with numerous flowers; calyx less than 2 mm. long; 

 petals 6 mm. long; pods 6.2 to *.' cm. long, considerably tapering at 

 base, with thick margins and a little puberulent. 



Only a single specimen collected, growing in a garden at La Paz. 

 It is called "tabardillo," by which name yellow fever was known to 

 the Indians. The root of this plant is now used by the people of this 

 region as a remedy for fevers. 



Collected by Dr. Edward Palmer, Januarv 20 to February 5 1890 

 (No. 22). ' 



This is Calliandra sp. of the ( 'ontributions, Vol. I, p. 69. It belongs 

 to Benthanf s series Nitidae, near C. Californica. 



Cassia nelsoni Pose, sp. nov. FIGURE 1 



■Shrub 3 to 4.5 meters high, glabrous; young branches clothed with 

 a reddish pubescence ; leaflets 4 to 7 pairs, very 

 unequal, obovate, the larger ones 2.5 to 5 cm. 

 long, obtuse, pubescent beneath, glabrous 

 and shining above; rachis pubescent, bearing 

 usually a glabrous slender gland between the 

 lower pair of ballets, rarely also between the 

 second pair; stipules seta- 

 ceous, deciduous, 12 mm. 

 long; flowers few in terminal 

 clusters, very large, 6.2 cm. 

 broad; pedicels and buds 

 densely reddish-pubescent; 

 Bepals broad, somewhat un- 

 equal, 6 to 10 mm. long, nearly 

 glabrate ; petals oblong, 25 to 

 30 mm. long, very pubescent 

 on the veins; fertile stamens 



Fig. l.—a, Legume of Cassia nelsoni, .scale § ; b, c, forms of leaflets 

 natural .size. 



