384 LXXXII. PRIMULACE^. Primula. 



Conspectus of the Genera. 



fi 7-cleft. Leaves in one whorl. . . TrientcUis. 4 



< 5-clelt. Flowers paniculate. . . Sa7nolus. 10 



Corolla white, ( 4-clelt. Plants 2 inches hiffh. . . Centunculus.9 



\ Stamens 6. Racemes a-xillary. . . Nainnburg-ia. 6 



Corolla yellow. I Stamens 5 Lysimachm. 7 



Corolla scarlet. Plant prostrate. Fls. solitary, axillary. Anagallis. 8 



J undivided. Corolla wanting^, caly.v colored, white Glaux. 5 



( caullne, ( pectinate-pinnatifid, submersed in water Hottonia. 1 



■? ^ Corolla segments spreading P? imula. 2 



Leaves ( all radical. Scape umbellate. { Corolla segments reflexed Dodecatheon. 3 



1. HOTTONIA. 



In honor of Peter Hotton, professor in the University of Leyden, died 1709. 



Calyx 5-parted ; cor. salver-form, with a short tube and a flat, 5- 

 lobed limb; sta. inserted on the tube of the corolla, included ; stig. 

 globose ; caps, globose-acuminate. — % Fleshy, aquatic herbs, with pec- 

 tinate-pinnatijid, submersed, radical Ivs. 



H. iNFLATA. Ell. (H. palustris. Ph. not Lvm.) Water Featlier. 



Scape articulate, the internodes and lower parts inflated; fis. verticillate, 

 pedunculate. — A curious aquatic plant, in swamps and stagnant waters, Ms., 

 R. I. and Ct., N. Y. to Flor. Stem immersed, round, thick, spongy, with a 

 whorl of long and beautifully pectinate leaves at or near the surface of the water. 

 Peduncles or scapes several (6—10) together, arising in a sort of umbel from 

 the top of the stem, 8 — 10' long, inflated betw^een the joints, forming the most 

 remarkable feature of the plant. Flowers small, white, in numerous verticils, 

 generally 4 in each. Pedicels ^' long. June. 



2. PRIMtJLA. 



Lat. 'primus, first ; because its blossoms appear earliest in spring. 



Corolla salver-form, with an open orifice ; capsule opening with a 

 lO-cleft dehiscence; stamens 5, not exserted ; stigma globose. — Herbs 

 (mostly European) 2cith radical Ivs. Fls. in an involucrate umbel on a 

 scape, showy. 



1. P. MisTAssiNicA. Michx. (Fig. 49.) 



Uvs. spatulate, dentate or crenate, obtuse or acute, attenuate at base; invol. 

 l_8-flowered; bracts 3 times shorter than the pedicels, linear-subulate; cal. 

 much shorter than the tube of the corolla; cor. sah^er-form, lobes obcordate. — 

 Shores of Seneca Lake, N. Y., Dr. SartwcU ! Lake Mistassins, Can. and through- 

 out Brit. Am. A very delicate plant, about 3' high. Leaves about 5, 5 — 8" by 

 3 — 4", almost petiolate. Flowers 5" diam., white. Pedicels 7" in length. 



2. P. FARiNosA, /?. Americana. Torr. BinVs-eye Primrose. 



L/is. narrow, veiny, elliptic-lanceolate, obtuse, denticulate at apex, attenu- 

 ate at ba.se, under surface covered with a yellowish- white, farinaceous dust ; 

 invol. farinaceous, 3 — 20-flowered, shorter than the pedicels ; bracts long-acumi- 

 nate; cal. segments lanceolate, acute; cor. salver-form, lobes obcordate, bifid, 

 obtu.se. — Shores of Lakes Huron and Superior, Nutt., Houghton, N. to lat. 66°. 

 Scape 6 — 12' high. Flowers purple or flesh-color. 



3. P. AURICULA. Auriclcd Primrose or Auricula. — Lvs. obovate, entire or ser- 

 rate, fleshy; scape many-flowered, central, as long as the leaves; invol. of short 

 leaves; cal. powdery. — 7^ Native of the Alps. A well known favorite of the 

 florist. The cultivated varieties are innumerable, and many of them of exqui- 

 site beauty and fragrance. May. f 



4. P. Ei.ATioR. Jacq. Oxlip Primrose. — Lvs. toothed, rugose, hairy on each 

 side; umbel many-flowered, with the outer flowers nodding; cr>r. flat. — 7|. Native 

 of Britain. Flowers yellow, scentless, in a simple umbel elevated upon a scape 

 a foot high, Apr. May. -f 



5. P. OFFICINALIS. Jacq. (P. veris. Cam.) Cowslip Primrose. — Lvs. toothed, 

 rugose, haiiy beneath ; umbels many-flowered, flowers all nodding ; cal. angular ; 

 cor. concave.— t; Native of Britain. Flowers yellow. The plant .smells strongly 



