550 SCROPHULARIACEAE 
greenish-yellow. Southern part of our area. Relic of Indian culture. 
June-Sept. 
Famity I1V.—SCROPHULARIACEAE. Ficwort FamiILy 
In our area nearly all the species are herbs, a single species, 
Paulownia, is a tree. Elsewhere shrubs and trees are found within 
the family. The leaves may be opposite or alternate, always 
simple, but the borders may be entire or more or less indented. 
The flowers may be solitary or in variously formed clusters. 
Flowers always more or less irregular, though in the first tribe 
the irregularity is slight. Calyx persistent 5- or 4-toothed or 
deeply divided. Corolla with a united petal more or less 2-lipped 
with a tube of greater or less extent. Stamens free from each 
other, inserted in the tube of the corolla, 5 or mostly 4 when 2 
are longer than the other 2, or in some cases only 2 fertile sta- 
mens. Pistil 1; fruit sometimes a berry more frequently a cap- 
sule. Seeds numerous. 
1. The Mullen Tribe 
Corolla nearly regular, wheel-form, generally with 5 fertile sta- 
MOUS | 0 Ge) eee be ec.) La. bist VS eee MMR iene ens WoC en eat av Ree 
2. The Snapdragon Tribe 
Corolla decidedly irregular, 2-lipped, the upper lip, in bud, cover- 
ing the lower; in bloom the lower lip approaches the upper so as 
nearly to close the throat (personate). Stamens (fertile) 4. 
Leaves usually opposite, at least below. 
Herbs. 
Corolla tube prolonged into a spur or forming a sac or swelling 
anteriorly. 
Tube with a spur. 
Leaves with veins diverging from mid-vein. 
Klowers ‘solitary. . 20%, 9. 5. “ .. GHEADINGtORS 
Flowers im clusters: . 2. i.‘ . . . = #e—aae 
stipe. saccate sw. 4.) a: oo AO ee os la) JAERI 
Corolla not spurred or saccate. 
Stamens 4. 
Tube of corolla inflated the 5th stamen represented 
by a scale, attached to the upper side of the 
COTO) ie Me tals ee) Made ie he hs ge 
Tube not inflated, clearly 2-lipped, the 5th stamen 
present, but shorter than the others and sterile; 
seeds winged . . . . . CHELONE 
The 5th stamen pone as long as he éuher) sterile; 
seeds without wings . . PENTSTEMON 
Tube of corolla 2-cleft nearly to Bae . . COLLINSIA 
Large tree. 2 eh eee Taint us Heaney bok Sento SY Sun cCev cuts 
