384 7 ‘CRUCIFERZ. 
longiuscule pedicellati, omnes partes diu persistentes, pedicellis gracilibus demum circiter 3 lin. 
longis, patentissimis ; sepala oblongo-elliptica, extus sparse pilosa, vix linea longa; petala 
obovata, emarginata, longiuscule unguiculata, sepalis paulo longiora ; filamenta filiformia, glabra. 
Siliqua immatura, lineari-oblonga, utrinque attenuata, 4-5 lin. longa, 15—-20-sperma. 
Sour Muxico, peak of Orizaba, 12,000 to 13,000 feet (Galeotti, 4677). Hb. Kew. 
A, Draba popocatepetlensis, Hemsley, Diag. Pl. Nov. pars alt. p. 18. 
Anniua (Galeotti) pilosa, radice fusiform, caule 4-8-pollicari, foliis radicalibus rosulatis creberrimis 
lineari-lanceolatis vel oblongis nec incrassatis integerrimis, caulinis interdum paucidentatis, 
floribus parvis flavis dense racemoso-corymbosis, sepalis obovato-rotundatis vel ellipticis extus 
pilosis flavescentibus, petalis late obovatis breviter unguiculatis sepalis aqualibus vel brevi- 
oribus, filamentis filiformibus glabris, ovario ovato-oblongo hirsuto, loculis 2-3-ovulatis. 
Herba annua (Galeotti) vel biennis, plus minusve pilis albidis longiusculis vestita. Radix fusi- 
formis. Caulis erectus, subsimplex vel ramosus, 4-8-pollicaris. Folia haud crassa, radicalia 
rosulata, creberrima, lineari-lanceolata, 9-12 lin. longa, integerrima ; caulina sursum gradatim 
minora, nonnulla hine inde remote dentata. Flores parvi, flavi, dense racemoso-corymbosi ; 
sepala concava, obovato-rotundata vel fere elliptica, minus quam sesquilineam longa, extus pilosa, 
flavesceutia, vix patentia ; petala obovata, apice rotundata nec emarginata, breviter unguicu- 
lata, sepalis equalia vel breviora vel admodum evoluta paulo longiora; filamenta glabra, 
filiformia; ovarium pubescens, ovato-oblongum, stylo brevi, loculis 2-3-ovulatis. Fructus a 
nobis non visus. 
Sourn Mextco, Popocatepetl, 12,000 feet (Galeotti, 4668), the highest vegetation on 
Popocatepetl at the volcanic sands (H. Christie). Hb. Kew. 
5. Draba tolucensis, H. B. K. Nov. Gen. et Sp. v. p. 78. 
Sourn Mexico, near the town of Toluca, 8000 feet (Humboldt & Bonpland), 
Toluca, on trachytic rock, at 13,000 to 14,000 feet (Heller), lake of the peak of 
Toluca, 12,000 feet (Galeotti, 4665). 
Description of the flowers of D. tolucensis :— 
Flores albi, conferti, circiter 1-14 lin. diametro ; sepalis concavis, ovato-ellipticis, apice rotundatis, 
extus parce pilosulis ; petalis obovato-spathulatis, integerrimis, sepala vix equantibus quam 
stamina paulo longioribus; filamentis filiformibus, glabris; ovario oblongo pubescente, stylo 
brevissimo, loculis circiter 6-ovulatis. 
H. B. K. (loc. cit.) do not describe the flowers. The above description of flowers is 
from Galeotti’s specimen, which agrees very well with their description as far as it 
goes; but the ovary is decidedly hairy, and they describe the capsule of their plant as 
glabrous ; hence it is possible that they are different species. 
6. Draba vulcanica, Benth. Pl. Hartw. p. 82. 
GuaTEMALA, in the crater of the Volcan de Agua (Hartweg). Hb. Kew. 
Tribe SISYMBRIEZ. 
10. SISYMBRIUM. 
Sisymbrium, Linn. Gen. Plant. n. 818; Benth. et Hook. Gen. Plant. 1. p. 77. 
Hooker and Bentham, J. ¢., estimate the number of distinct species at about eighty, 
mostly natives of South and Central Europe, Western Asia, and Siberia, a few of 
