5388 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2. Heliotropium greggii Torr. U. S. & Mex. Bound. Bot. 137. 1859. 
Tyre tocauity: Valley of the Conchos near Santa Rosalia, Mexico. 
RANGE: Western Texas to New Mexico and Mexico. 
New Mexico: South of White Sands; mesa near Agricultural College; Artesia; 
Roswell. Sandy plains, in the Lower Sonoran Zone. 
123. BORAGINACEAE. Borage Family. 
More or less rough-hairy annual or perennial herbs, with simple, alternate, exstip- 
ulate leaves, the flowers in cymes, these often helicoid; leaves mostly entire and small; 
flowers perfect, usually regular; calyx of 5 united persistent sepals; corolla tubular, 
funnelform, or salverform, deciduous; stamens 5, adnate to the corolla tube; filaments 
sometimes appendaged; pistil with a single style; ovary deeply 4-lobed; stigmas 
simple or 2-lobed; fruit of 2 or 4 seedlike nutlets. 
KEY TO THE GENERA. 
Corolla oblique, the lobes unequal...................-. 13. Ecutum (p. 547). 
Corolla regular, with equal lobes. 
Nutlets with hooked prickles, at least on the 
margins. 
Nutlets spreading, covered with prickles...... 1, CyNoGLossuM (p. 539). 
Nutlets erect or incurved, with prickles on the 
back or angles.........-.-.............. 2. Lappuna (p. 539). 
Nutlets unarmed or if prickly the prickles not 
curved. 
Receptacle (gynobase) flat or slightly convex; 
nutlets attached laterally or by the base. 
Nutlets obliquely attached; corolla blue 
or pink, tubular-funnelform....... 3. Merrensta (p. 541). 
Nutlets attached at the very base; corolla 
never blue or pink, of various 
shapes. 
Corolla salverform, mostly yellow (in 
one species greenish).......... 4. LrrnospERMuM (p. 542). 
Corolla tubular, slightly open at the 
throat, with erect lobes, mostly 
dull greenish yellow. 
Stamens included; corolla about ° 
. lem. long.................... 5. OnosMoptium (p. 543). 
Stamens exserted; corolla 3 cm. 
long or More........... 6. MacroMERIA (p. 543). 
Receptacle (gynobase) elongated or conic; 
nutlets attached laterally. 
Nutlets attached below the middle, 
mostly near the base. 
Perennial, cespitose; flowers bright 
blue......2.2......... eee eeeee 7. Errrricatum (p. 544). 
Annual; flowers white............... 12, ALLocarya (p. 547). 
Nutlets attached at the middle or from 
the base to or above the middle. 
Perennials................22...2..0.. 10. OrEocARYA (p. 544). 
Annuals. 
Nutlets attached by the middle.. 9. PLacionoTurys (p. 544), 
