286 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
3. Sisymbrium officinale leiocarpum DC. Prodr. 1: 191. 1824. Hzpae mustarp, 
Type Locauity: “In Carolina merid. et Teneriffa.”’ 
New Mexico: Gilmores Ranch (Wooton & Standley 3642). 
A common introduced weed in many parts of North America, still rare in New 
Mexico. 
4. Sisymbrium altissimum L. Sp. Pl. 659. 1753. 
Type Locauiry: ‘Habitat in Italia, Gallia, Siberia.’ 
New Mexico: San Juan Valley. 
A native of Europe, widely introduced into the United States, a noxious weed in 
the Northwest. 
27. SOPHIA Adans. TANsy MUSTARD. 
Annuals, more or less stellate-pubescent; leaves once, twice, or thrice pinnately 
parted into mostly small segments; flowers small, in terminal racemes; petals usually 
yellow, white in one species; racemes elongated in fruit; siliques from one-half to one 
and one-half times the length of the pedicels; seeds in apparently one row in some | 
species, really from alternate funiculi from two lateral placentz in each cell, mostly 
in two evident rows. 
KEY TO THE SPECIES, 
Petals white; leaves nearly all thrice pinnately parted ...... ...-. Ll. S. ochroleuca, 
Petals yellow; leaves mostly once or twice pinnately parted. 
Plants appearing glabrous, really sparingly stellate-pubescent, 
green. 
Pedicels erect, like the pods, seemingly appressed to the 
rachis... 22.2222. e ee eee eee eee ceeeeee 2. 8. procera. 
Pedicels divergent; pods erect or curved. 
Inflorescence glandular-pubescent; pods longer than 
the pedicels. .............000.00..0.0202000 00. 3. S. incisa. 
Inflorescence merely sparingly stellate-pubescent, 
not glandular; pods shorter than the pedicels.. 4. S. serrata. 
Plants canescent, thickly and persistently stellate-pubescent, 
grayish green. 
Plants tall, 80 to 120 cm.; segments of the leaves large, 
some of them obtuse; sepals yellow. 
Inflorescence glandular-pubescent, not canescent... 5. S. adenophora.: 
Inflorescence canescent with stellate hairs, like the 
rest of the plant... .....2.2..2.......0..0-2. 6. S. obtusa. 
Plants lower, 30 to 60 cm. high; leaf segments mostly very 
small; sepals purplish. 
Plants slender, sparingly branched; inflorescence 
glabrous... 22.22... 2 eee eee eee eee 7. 8. glabra. 
Plants stout, much branched; inflorescence glandular 
or stellate-pubescent. 
Plants divergently much branched from the base; 
inflorescence strongly glandular, not stel- 
late-pubescent; petals equaling the sepals. 8. S. halictorum. 
Plants with more erect stems; inflorescence stel- 
late-pubescent, sometimes sparingly glan- 
dular; petals longer than the sepals.....-. 9. S. andrenarum. 
1. Sophia ochroleuca Wooton, Bull. Torrey Club 25: 455. 1898. 
Type Locauity: Mesilla Park, New Mexico. Type collected by J. D. Tinsley. 
Ranae: Southern New Mexico, probably also in adjacent Arizona and Mexico, 
