308 ROSACEAE 
Petals 3 times as long as broad Gillenia 
Flowers white in dense elongated heads or spikes; 
flowers without petals . . . . . Sanguisorba 
Flowers without petals, in slender spikes forming a 
compound ‘cluster f. 3) #95 2 Jie, | ee 
1. PHYSOCARPUS, Maxim. 
Branching shrubs with alternate, broad, deeply lobed leaves. Flowers 
in dense terminal rounded clusters, white. Calyx bell-shaped, with 5 
sepals; petals 5, inserted in the throat of the calyx. Fruit 1 to 5 dry, 
several seeded carpels inflated. 
P. opulifolius, Maxim. (Fig. 2, pl. 62.) NineparK. (Opulaster 
opulifolius, (L.) Kuntze. Spiraea opulifolia,, L.). A rare and beautiful 
shrub, 3 to 10 ft. high. Leaves 1 to 2 in. long, roundish with 3 lobes 
and notched borders. Bark loose, falling in strips. Stipules falling 
early. Clusters of white flowers nearly spherical. River banks and 
rocky hills of our region. June. 
2. SPIRAEA, L. 
Shrubs with alternate simple leaves without lobes. Sepals 5; petals 
5; stamens 10 to 50. Fruit dry, several seeded carpels, 3 to 12. Flowers 
in terminal clusters, white or rose color, not yellow. 
Flowers in pyramidal cluster. hee 
Twigs smooth, yellowish-brown; flowers white S. salicifolia 
Twigs smooth, reddish-brown; flowers white or light pink . S. latifolia 
Twigs hairy, flowers rose color 3. oe ey Sl stomentosn 
Flowers in flattened cluster . . . : « 5 « os .cCOnvmbosn 
l. §. salicifolia, L. (Fig. 1, pl. 62.) W1tLow-LEAvED Mrapow 
Sweet. Erect shrub with smooth yellowish-brown twigs and elliptic, egg- 
shaped or lance-shaped leaves on short leaf-stalks. Borders of. leaves 
sharply toothed. Flowers in a pyramidal group, individual flowers 1/6 
to 1/4 in. broad, white or pinkish-white. In moist grounds and on hill- 
sides in southern section of our range. June-Aug. 
2. §. latifolia, Borkh. Mrapow Sweet. Similar to No. 1, but twigs 
are reddish or reddish-brown. Color of flowers as in No. 1. Common in 
pastures, ete. June-Aug. 
3. §. tomentosa. L. (Fig. 3, pl. 62.) Harpuack. STEEPLE BUSH. 
Erect, slender shrub, generally with few or no branches. Stem covered 
with soft hairs. Flowers in a tall conical cluster, purple or pink. In 
old fields and pastures in our area. July-Sept. 
4. §. corymbosa, Raf. Corympep Sprraga. Leaves broadly oval or 
egg-shaped. Flowers in a spreading flattened cluster (corymb), white. | 
Rocky places, New Jersey and south. May-June. 
3. GILLENIA, Meench. (Porteranthus, Britton) 
Erect herbs from a perennial root. Leaves 3-foliate with conspicous 
stipules. Flowers white or pink with 5 long narrow petals inserted 
into the throat of the calyx. Calyx tubular, of 5 sepals. Stamens 10 
