ST. JOHN: SABLE ISLAND. 89 
Centunculus minimus L. Locally found on bare sand flats 
wliich are occasionally flooded by the sea. J . Macoim (C. no. 22,544) ; 
H. St. John, no. 1,303 (H). 
FL, Fr. — August. 
GENTIANACEAE. 
[Sabbatia chloroides Pursh. "The chief annual is of southern 
extraction." The material on which this record of J. Macoun's 
(M. p. 218A) is based is Centauriuin utnhcllatum.] 
Bartonia iodandra Robinson, var. sabulonensis Fernald, n. 
var., a forma typica recedit floribus numerosis (4-30), ramibus saepe 
dichotomis, pedunculis valde clavatis, calyce valde fisso lobis pler- 
umque distinctis. 
Differing from the typical form in its more numerous (4-30) 
flowers; the branches often dichotomous; peduncles more clavate; 
calyx deeply cleft, the lobes mostly distinct. 
Nova Scotia: swampy edges of fresh ponds. Sable Island, August 
30 and September 12, 1913, //. St. John, nos. 1,300, 1,307 (type in 
Gray Herb.). 
Fl. — August and September. Fr. — Septemi)er. 
In typical Bnrtonia iodandra of Newfountlland and Cape Breton 
the 1-7-flowered plants have simple branches and the peduncles are 
more filiform. The calyx in all the Newfoundland and Cape Breton 
material (examined from eight regions) is cleft only % to ^4 to the 
base, the tube being 1-2 mm. long and nerveless. The Sable Island 
plant with usually more numerous flowers on often forking branches 
rarely has a definite calyx-tube, most of the material showing the 
calyx with lobes distinct essentially to the base, the margins of the 
outer lobes decurrent down the peduncle. In this character the 
Sable Island plant approaches the more southern B. virgin ica (L.) 
B S P. and B. paniculata (Michx.) Robinson, in both of which the 
calyx-lobes are essentially distinct. In those more southern yellow- 
i.sh-stemme(l plants, however, the yellowish-green calyx-loltes and 
the usually yellowish leaves are firm and sul)ulate and the yellow 
corolla is at most 5 mm. long. The Sable Island plant has the leaves 
scattered or alternate as in B. paniriildta but, like thosi' of }i. iodandra, 
they are ovate to oblong-lanceolate, bluntish and purpK-. The stem 
likewise is purple, the caiyx-lolx's Hat aiul tliin, o\ate to oblong- 
lanceolate, and the mature ju-taloid whitish corolla .">-() nun. long, all 
characters of B. iodandra. The anthers of B. iodandra are generally 
