444 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
HARPERELLA Rose, Proc. Biol. Soc. Wash. 19: 96. 1906. 
HarperiA Rose, Proc. Nat. Mus. 29: 441. 1905, not Fitzgerald, 1904. 
This genus has been described since the publication of our Mono- 
graph, and is represented by the following species from Georgia and 
Alabama: 
Harperella nodosa Rose, Proc. Biol. Soe. Wash. 19: 96. 1906. 
ALETES C. & R. Rev. N. Am. Umbell. 27. 1888. 
Aletes obovata Rydberg, Bull. Torr. Club 81: 573. 1904. 
PTILIMNIUM Rat. Am. Month. 4: 192. 1819. 
DiscopLeuRA DC, Mém. Ombell. 38. 1829. 
Ptilimnium costatum. (Ell.) ©. & R. 
Ammi costatum Ell. Bot. 8. C. & Ga. 11350, 1821. 
Discopleura capillacea costata DC. Mém, Ombell. 89. pl. 8.7. B. 1829. 
Discopleura costata Chap. Fl. South. U.S. 162. 1860. 
Stems stout and erect, 120 to 150 em. high, 1 em. in diameter, hollow, strongly 
fluted; leaves long-petioled, somewhat rigid, finely dissected, the segments verv nu- 
merous, crowded, and appearing verticillate; peduncles short and stout, 10 em. long 
or less; involucral bracts simple or deeply cleft; involucel bractlets linear, entire, 
short; umbels few, large; rays 4 cm, long; pedicels 7 mm. long; flowers autumnal, 
white; fruit ovate, 4 to5 mm. long, the dorsal and intermediate ribs prominent; 
style slender, much longer than the prominent stylopodia. 
“Swamps along the margin of the Ogeechee River,’? Georgia (type locality), and 
swamps near Wilmington, North Carolina. 
When the Monograph was written, our only material of this form consisted of 
flowering specimens from G. MeCarthy, collected in swamps near Wilmington, 
North Carolina, and attention was called to the stouter habit and the leaf characters 
in which it differed from P. capillaceum. Edwin B. Bartram has now sent us 
fruiting material from Wilmington which confirms Elliott’s statement as to its 
autumnal habit and larger fruit with more prominent ribs. Mr, Bartram’s letter is 
as follows: 
In your Monograph of the Umbelliferae I notice a reference to aspecies of Ptilim- 
nium from Wilmington, North Carolina, that had not at that time been collected 
in good fruiting condition. While collecting in this region last fall, 1 noted this 
plant with particular interest and was fortunate in securing one head with mature 
fruit. The plants I observed had finely dissected, rather rigid leaves, and stout hol- 
low stems about 1 em. in diameter at the base and averaged about 12 dm. in height. 
It seems to be very distinet from P. capillaceum of the coastal plain, and the long 
recurved styles as well as the size and shape of the fruit and general habit rather 
suggest some specific if not generic distinetion. 
Ptilimnium missouriense ©. & R. sp. noy, 
Stems stout, 60 to 90 cm. high, somewhat fluted; leaves short-petioled, finely dis- 
sected; peduncles 16 em. long or less; involucral bracts simple or cleft, linear or with 
linear lobes; involucel bractlets linear, entire; rays 10 to 35, nearly equal in each 
umbel, 2 to5 cm, long; pedicels 3 to 8 mm. long; flowers autumnal, white; calyx teeth 
acute, prominent but shorter than the stylopodium; fruit broadly ovate, 2 to 3 mm. 
long; dorsal and intermediate ribs filiform; stylopodia prominent; styles long, slender, 
Collected by George W. Lettermann at Allenton, Missouri, August 27, 1878 (type), 
and by B. F. Bush in Butler County, Missouri, October 16, 1905 (no. 3709). 
Type in U. 8. National Herbarium no, 140648. 
This species has been distributed as P. nuttallii, but its very different fruit justifies 
our giving it specific rank. 
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