40 RUBIACEjE. Hedtotis. 



5. H. purpurea : stems erect or ascending, tetragonal, pubescent (at least 

 when young) with spreading liairs ; leaves ovate or ovate-lanceolate, closely 

 sessile, 3-5-nerved from the base, glabrous or sprinkled with scattered hairs 

 above, the veins of the lower surface and margins pubescent ; umbelliform 

 cymules 3-7-flowered, often clustered ; Jobes of the cal3'x subulate-linear, 

 three or four times the length of the tube, and manifestly longer than the 

 subglobose capsule. — H. umbellata, Walt. Car. p. 85 ? Houstonia pur- 

 purea, Lin?u ! spec. 1. p. 105 ; Pursh ! ji. 1. p. 167 ; Ell. sk. 1. p. 193 ; 

 Torr. ! jl.l. p. 173. H. varians, Miclix. ! fi. 1. p. 86, in part. H. pubes- 

 cens, Raf. in med. repos. {hex. 2) 5. p. 361 ? Anotis lanceolata, DC. 

 prodr. 4. pi. 433 ? 



/?. lobes of the calyx lanceolate-linear, almost equalling the corolla; leaves 

 lanceolate. — Houstonia macrosepala, Nutt. ! mss. Hedyotis lanceolata, 

 Poir. suppl. 3. p>. 14 ? 



Woods and river banks, Mar^'land ! Virginia ! Western Pennsylvania, 

 and Ohio ! to Alabama ! Tennessee ! and Missouri ! May-July. — Stems, 

 usually several from the same root, branching, about a foot high. Leaves 

 1-2 inches long, in size and shape not unlike those of Galium circKzans, 

 rounded at the base, rather acute ; varying however to lanceolate; the upper 

 surface either hairy or glabrous. Stipules ovate, scarious. Corolla purple, 

 about 4 lines long, slightly hairy inside ; the tube usually longer than the 

 lobes of the calyx. Stamens all exserted in some specimens, all included in 

 others ; the filaments in the former case coherent with the tube of the corolla 

 to the summit, but they may sometimes be partially detached without 

 laceration. Capsule free only at the summit; the cells several-seeded. 



6. H. ciliolata {Torr.) : stems usually numerous and somewhat caispitose, 

 nearly glabrous ; leaves rather thick, obscurely 1-nerved ; the cauline ones 

 oblanceolate or linear-oblong, mostly obtuse, sessile, minutely ciliale; 

 the radical and lowest cauline ones oval-spatulate, tapering into a petiole, 

 ciliate with rigid hairs ; cymules mostly 3-flowered, in corymbose clusters ; 

 peduncles and pedicels short ; lobes of the calyx lanceolate-subulate, about 

 the length of the subglobose capsule. — Torr.! in Spreng. cur. post. p. 40 ; 

 DC. prodr. 4. p. 422 ; Hook. I. c. Houstonia ciliolata, Torr. ! fi. 1. p. 

 174. H. Canadensis, Mold, in herb. Wdld. ! H. serpyllifolia, Graham, in 

 hot. mag. t. 2882, not oi Michx. 



Banks of rivers and lakes, Canada {Pursh ! in herb. Lamb.), Michigan ! 

 Falls of Niagara! and on the shore of Lake Ontario! nearly confined to 

 limestone formations. Kentucky, Dr. Short! May-July. — Stems 4-6 

 inches high, often with slightly margined angles. Radical leaves in rosu- 

 late tufts, somewhat coriaceous ; the cauline pairs rather few and distant, 

 shorter and broader than in H. longifolia : the flowers much more numerous 

 than in that species, clustered, lilac or pale purple. Stipules scarious, round- 

 ish, rather large. Calyx-lobes about half the length of the tube of the corolla. 

 Capsule about half free ; the cells 8-9-seeded. 



7. H. longifolia (Hook.) : glabrous ; stems erect, 4-angled with decur- 

 rent lines; leaves linear or oblong-linear, acute or obtuse, tapering to the 

 base, 1-nerved ; the radical ones oval or oblong, narrowed into a petiole ; 

 cvnmles 2-3-flowered, somewhat paniculate ; the pedicels at first short, at 

 length nearly equal and longer than the fruit ; lobes of the calyx subulate- 

 lanceolate, mostly longer than the tube, but shorter than, or scarcely exceed- 

 ing, the subglobose capsule. — Hook.! fi. Bor.-Am. 1. p. 286. (excl. syn. 

 Miclix.) Houstonia longifolia, Geertn. Jr. \. p. 226, t. 49, /. 8 (fruit); 

 Willd. ! spec. 1. p. 583 ; Ell. I. c; torr. ! I. c ; Bigcl. fl. Bost. ed. 2. 



p. 53; Hook. hot. mag. t. 3099. H. angustifolia, Pursh! fi.. 1. p. 106, not 

 of Michx. 



(3. tenuifolia: stem and numerous divaricate branches very slender; 



