PARK AND CEMETERY. 
Polymnia in 12 species are North and South 
American; some have been used in sub-tropical 
gardening. 
Silphium “compass plants” are natives in 11 
species. 
Iva in about 8 species are North and South 
American and West Indian “High Water Shrubs.” 
I. frutescens has found its way into a few gardens. 
Oxytenia, Dicoria, Hymenoclea and Franseria 
are Californian and Mexican genera of a shrubby 
character. 
Zinnia has 12 species from Mexico and the S. 
W. United States. 
Sanvitalia has 9 species from Mexico and the 
South Western United States. S. procumbens var- 
ies somewhat, andisa usefullowannual edging plant. 
Varilla in 2 species from Mexico and Texas are 
low shrubs with fleshy narrow leaves and cymes of 
small yellow flowers. 
Montanoa has 14 species mostly Central Ameri- 
can and Columbian. M. heracleifolia is used as a 
sub-tropical foliage plant in Europe and in good 
soil grows to a large size. 
Rndbeckia is a genus of 25 species very well 
named “cone flowers.” R. laciniata has recently 
had a double variety brought into some prominence. 
It makes a good lawn specimen but needs well 
staking. 
Bomchia in 3 or 4 species are fleshy maritime 
shrubs extending from South America to Virginia. 
Helianthus the well known “sunflowers” are in 
fifty species, natives of North America, Peru and 
Chili. Several of the perennial and annual kinds 
are excellent garden plants. H. cernuus or Flour- 
ensia cernua is a shrub found in the arid regions of 
DAHLIA, JUAREZIIVAR. DAHLIA, DOUBLE VARS. 
the southwest. Two or three Encelias also become 
shrubby in the same region, 
Podachcenium is a monotypic Central American 
genus whose name now seems to be borne by Fer- 
dinandia eminens, a tall growing large leaved sub- 
ject used in sub-tropical gardening. 
Coreopsis in 55 species are well-known North 
American, Sandwich Island and African plants. A 
number of old genera such as calliopsis are now in- 
cluded under this name. C. gigantea and C. mari- 
tima are types of a half shrubby Californian section 
sometimes known as Leptosyne. Pugiopappus is 
still another section of the genus. 
Dahlia has probably not more than half a dozen 
good species, all Central American and Mexican. 
D. coccinea, D. variabilis and D. scapigera prob- 
ably, are the species from which the host of double 
garden forms have been derived. D. Juarezi has 
now been added, and is exercising its influence in 
the production of so-called “cactus” dahlias. D. 
excelsa grows to 30 feet high it is said, and in Cali- 
fornia gardens although not so large, flowers finely 
and often, but chiefly during autumn. D. Imper- 
ialis with yellow, white and pinkish flowers grows to 
RUDBECKIA LACINIATA, FL. PL. 
