126 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2. Commelina crispa Wooton, Bull. Torrey Club 25: 451. 1898. 
Commelina virginica of many authors, not L. 
Tyre Locauity: At the base of the Organ Mountains, New Mexico. Type collected 
by Wooton (no. 545). 
Rance: Colorado and Missouri to New Mexico. 
New Mexico: Santa Rita; Dog Spring; Tortugas Mountain; Organ Mountains; 
Jarilla Junction; Knowles; Nara Visa; Carrizozo; Orogrande. Dry plains and hills, in 
the Lower Sonoran Zone. 
2. TRADESCANTIA L. Sprperwort. 
Perennial herbs with simple or branched erect stems, narrow elongated leaves, 
and showy flowers in terminal umbel-like cymes subtended by leaflike bracts; sepals 
3, distinct, herbaceous; petals 3, sessile, blue. 
KEY TO THE SPECIES. 
Plants small, 25 cm. high or less; sheaths strongly pubescent, 
especially along the margins; roots tuberous, the tubers 
attached along a creeping rootstock.......-................ 1. 7. pinetorum. 
Plants larger, 30 to 60 cm. high; sheaths glabrous; roots somewhat 
fleshy, fascicled. 
Plants sparingly branched, green; sepals and pedicels densely 
glandular-pubescent ..............-2--0-20--2--e-0022- 2. T’. occidentalis. 
Plants much branched, glaucous; sepals and pedicels sparingly 
glandular..............-.- 22-2222 2-222 e eee eee eee eee 3. T. scopulorum. 
1. Tradescantia pinetorum Greene, Erythea 1: 247. 1893. 
Tradescantia tuberosa Greene, Bot. Gaz. 6: 185. 1881, not Roxb. 1798. 
TYPE LocALity: Pinos Altos Mountains, New Mexico. Type collected by E. L, 
Greene. 
Rance: New Mexico and Arizona. 
New Mexico: Mogollon Mountains; West Fork of the Gila; San Luis Mountains; 
Tularosa Creek. Upper Sonoran and Transition zones. 
2. Tradescantia occidentalis Britton, Mem. N. Y. Bot. Gard. 1: 87. 1900. 
Tradescantia virginica occidentalis Britton in Britt. & Brown, Illustr. Fl. 1: 377. 1896. 
Type Loca.itry: ‘‘ Wisconsin to Missouri, Texas, and New Mexico.”’ 
RANGE: As above. 
New Mexico: Hills near Clayton (Bartlett 235, 252). Upper Sonoran Zone. 
3. Tradescantia scopulorum Rose, Contr. U. 8. Nat. Herb. 8: 205. 1899. 
Type Locatity: Santa Catalina Mountains, Arizona. 
Rance: Western Nebraska and Montana to Arizona and western Texas. 
New Mexico: Gallup; Zuni Reservation; Organ Mountains; East Canyon. Dry 
hills, in the Upper Sonoran Zone. 
17. PONTEDERIACEAE. Pickerel-weed Family. 
1. HETERANTHERA Willd. Mup Plantain. 
Succulent herb with branched stems, numerous oval or ovate long-petioled leaves, 
and small white or blue flowers in 1-flowered spathes; lobes of the perianth linear; 
stamens 3, equal; fruit an ovoid many-seeded capsule. 
1. Heteranthera limosa (Swartz) Willd. Ges. Naturf. Freund. Berlin Mag. 3: 439. 
1801. 
Pontederia limosa Swartz, Prodr. Veg. Ind. Occ. 57. 1788. 
Type Locauity: ‘Jam. Hispaniola.”’ 
RanGE: Virginia to New Mexico, southward through Tropical America. 
New Mexico: Santa Rita; Middle Fork of the Gila. In mud or shallow water. 
