“Type lewisii Pursh. Syringas shrub 1-4 ws All; the stems erect, oF ay 
Hydrangeaceae. Hydrangee Family. 
Shrubs or trees with opposite, simple leaves without stipules. 
Flowers perfect, often showy. Sepals 4-10. Petals 4-10, stamens perigynous, ~~ 
Samany. Pistil 1, of aee-er-rereiy-i0'linited carpele, inferior. Fruit a cap- 
sule, usually opening at the top. / a x 
Philadelphus L. Mock Oranges 
Rrect deciduous shrubs with flowers in terminal racemes-er panicles, igs <i: 
Sepals 4 or 5, valvate in the bud, persistent. Petals 4 (or 5), white. bs, 
Stemens numerous, filaments subulate, Ovary more than half inferior, 4 
chambered, forming @ rather woody loculicidal capsule. 
drooping, bark fuscous, soon checking and shredding longitudinally, new growth — = 
soon light brown; leaves 6-8 an. long,)-smeiier—in_plants of onid—hebdipet he 
elliptical or ovate or even subrotund,\ obtuse (rarely acute) at the base, acute — 
or, more commonly, acuminate at the apex, veins commonly 3 (sometimes 5) from : 
or near the base, glabrous or one or both surfaces sparingly pubescent with 
curved appressed hairs, margins subentire or shallowly and irregularly denti- 
culate; flowers white, showy in terminal racemes 3-5 cme long, the lowermost 
bracts leaflike, the upper reduced and deciduous; calyx 8-9 mm. long, the 
sepals ovate, acuminate, somewhat longer than the tube, pubescent on the in- 
side near the margin; petals oval or elliptical or frequently obovate, 12-15 
mm. long, spreading; stamens about 1/3 as long as the petals, erect, exceédin g 
the styles which are united 1/3-2/3 their length; capsule ovoid, 8-10 mn. 
long, enclosed within the erect or sometimes reflexed persistent sepals, 
splitting septicidally, dehiscing loculicidally at maturity; seeds brown, 
,shining, 2-5 mm. long, lanceolate, curved, the testa forming an unequal wing. 
(Pp, columbianus Koehne; Pe Helleri Rydbe} 
“Wommon throughout our region in dry situations below 4000 feet, in 
burns, along roadways, rock ledges ete; flowers with parts in fives frequently 
oceur; commonly fragrant, frequently odorless, however. 
/ 
