520 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
inserted, epipetalous; ovary 3-celled, with a thick axis; styles united; stigmas 3; 
fruit a 3-celled loculicidal capsule; seeds several or solitary in each cell, the coats 
sometimes mucilaginous. 
KEY TO THE GENERA. 
Calyx not ruptured by the capsule; leaves alternate; 
seeds with mucilage and spiracles (spirally 
twisted threads) when wetted. 
Calyx teeth spinulose-tipped; leaves pinnatifid 
with linear segments; flowers blue, in few- 
flowered woolly heads................... 
Calyx teeth herbaceous, not spinulose-tipped; 
leaves and flowers various. 
Leaves simple, entire; flowers small, capitate- 
crowded; stamens straight............ 
Leaves pinnatifid; flowers large, variously 
arranged; stamens declined........... 
Calyx at length ruptured by the maturing capsule; 
leaves alternate or opposite; seeds with or 
without mucilage and spiracles when wet. 
Calyx tube not at all or but slightly scarious, 
early splitting; leaves sessile, divided into 
several linear spinulose segments; seeds 
without mucilage and spiracles; plants 
strongly scented.............0..002..0.. 
Calyx tube more or less scarious between the 
lobes, distended, then ruptured by the 
capsule; leaves sessile or petiolate; seeds 
with or without mucilage when wet. 
Corolla salverform, with a very narrow throat. 
Seeds mucilaginous when wetted; annual 
with alternate floral leaves....... 
Seeds not altered when wetted; per- 
ennials with all the leaves oppo- 
SIt@..- 2... eee ee eee eee eee 
Corolla funnelform or tubular, with an open 
throat. 
Leaves alternate; inflorescence panicu- 
late, thyrsiform, or capitate... .. 
Leaves opposite, spinulose-tipped; in- 
florescence various. 
Flowers bluish, sessile; leaves with a 
few narrow unequal segments 
or simple...............--.- 
Flowers bright yellow, long-pedicel- 
ed; leaves with several nearly 
equal segments appearing as 
2. 
3. 
. Ertastrum (p. 520). 
CoLiomia (p. 521). 
PoLEMONIUM (p. 521). 
. LEPTODACTYLON (p. 522). 
. MicrosTEris (p. 523). 
. PHiox (p. 523). 
. GILIA (p. 525). 
. Linanruus (p. 529). 
a verticel of linear leaves.... 9. DacryLoPHYLLUM (p. 529). 
1. ERIASTRUM Woot. & Stand]. 
Low, wiry-stemmed, widely spreading annual, at first white-woolly throughout, 
the stems and lower leaves later glabrate; leaves alternate, sessile; flowers small, 
blue or white, in few-flowered glomerate heads surrounded by several crowded woolly 
