RUTACEA. 167 
foliolata, lamina cum petiolo articulata, minute pellucido-punctulata, membranacea, integra, 
lanceolata, 6-12-pollicaris, breviter acuminata, acuta, costa venisque lateralibus subtus promi- 
nentibus, petiolo omnino tereti 2-4-pollicari. Flores in cymas scorpoideas parvas densas 2-4. 
ramosas longe pedunculatas dispositi, pedunculis axillaribus nudis 6-9-pollicaribus, pedicellis 
brevibus (1-2 lin.) basi bracteolatis sparse pubescentibus, bracteolis parvis deciduis ; sepala 
persistentia, colorata, inequalia, anguste lanceolata, acuta, ad pollicaria, extus puberula; petala 
in corollam arcuatam extus dense sericeo-villosam coalita, ad bipollicaria, apice libera, patentia ; 
stamina 5, inclusa, antheris 3 inferioribus vacuis, filamentis cum corolla coherentibus. Car- 
pella 5 (“ovula et capsula seminaque Erythrochitonis,” Baillon).—Toxosiphon lindeni, Baill. 
Adansonia, x. p. 310. 
Sout Mexico, dark forests of Teapa, Tabasco (Linden, 1623); NicaRraeva, without 
locality (Tate, 41 and 42). Hb. Kew. 
EXPLANATION OF TAB. XII. 
Inflorescence and leaves, natural size. 
Fig. 1, a flower cut open, showing the three sterile and two fertile stamens; 2, a fertile stamen, 
enlarged. 
L have not been able to follow Baillon in regarding this as the type of a distinct 
genus. 
Tribe RUTEA. 
Herbs or undershrubs, with the exception of three or four species confined to the 
Old World. 
| 2. PEGANUM. 
Peganum, Linn. Gen. Plant. n. 601; Benth. et Hook. Gen. Plant. i. p. 287. 
Four herbaceous species are known: one is widely dispersed in the Old World; two 
are natives of Central and Eastern Asia; and one is Mexican. 
1. Peganum mexicanum, A. Gray, Pl. Wright. i. p. 30 in adnot. 
New Mexico.—Nortn Mexico, Saltillo and Monterey (Gregg); El Gallo, Chihuahua 
(Thurber, 836), San Luis Potosi to San Antonio (Parry, 105). Hb. Kew. 
3. THAMNOSMA. 
Thamnosma, Torr. et Fremont, 2nd Report, p. 313 5 Benth. et Hook. Gen. Plant. i. p. 288. 
The genus is at present limited to the following species, which are both undershrubs, 
and an undescribed species recently discovered in South Africa. 
1. Thamnosma texana, Benth. et Hook. Gen. Plant. i. p. 288. 
Rutosma texana, A. Gray, Gen. Il. ii. p. 148, t. 155. 
Tuxas; New Mexico.—Norra Mexico, Santa Cruz, Sonora (Wright), Monterey, Nuevo 
Leon (Gregg), San Luis Potosi to San Antonio (Parry, 104). Hb. Kew. | 
