1792 



THALICTRUM 



thP thrfi' angles 

 B.M. Tl.Vi. G.C 



stiV'itate. 

 III. S:12: 



)f the HiniaUiyas so 



Summer. Jits, of E. (Jliiiia. 



.-A .-lose ally of T. Vh,^li- 



much admired iu Europe. 



Well worth introduc- 



tiou- 



1 1 . ocoidentale, Gray. 

 Allied to T. dioiciiiii, 

 which it closely resem- 

 bles, but it is more ro- 

 bust and taller: Ivs. 

 ijlaudular -puberulent : 

 akeues long, slender, 



'. thiu- walled, 2-edged, 



ribbed, not furrowed. 



12. F§ndleri,Eugelm. 

 Fit,'. ■24;)4. A varialilr 

 species. Plants l-:i ft. 

 high, rather stout and 

 leafy: ivs. four to live 

 times ()innatifid, upper 

 stem-lvs. sessile; Ifts. 

 rather firm, ovate to 

 orliicular, usually with 

 many shallow rounded 

 or acuminate h>l)es: 

 bases varialde: lis. di- 

 cecious, in rather cuu- 

 pact panicles; stamens 

 many, anthers long : 

 aken'es nearly sessile, 

 obliquely ovate, flat- 

 tened, .3^ ribs on each 

 f.ace. July. Aug, W. 

 Texas to Montana. 



13. polyc4rpum, Wat- 

 son. Allied to r. Fend- 

 leri: glabrous through- 

 out: Ifts. long-petioled. 

 fla. dicecious, in rather 



2494. Thalictrum Fendleri (X i^). close panicles: akenes 



larger, in a dense glo- 

 bose head, short-stalked, obovoid, turgid, tapering into 

 retlexed styles. .Summer. Sandy streams, Calif, to 

 Columbia river. K. C. Davis. 



THAMNOCALAMUS. See Bamhoo, p. 127. 



THAMN6PTEKIS (Greek, huxhij fern). Poli/podi- 

 Aceir. A genus of simple - leaved ferns growing iu 

 crowns, sometimes united with Asplenium. The elon- 

 gate indusia are in parallel rows on the veins of the 

 banana-like Ivs., often extending nearly to the margins. 

 The veins are free below but are united at the apex by 

 a transverse intramarginal vein. 



Nidus, Presl. (Asplhiiiim and Tltnmndpteris JTldns- 

 Aris, Hort.). Bird's Nest Fern. Lvs. bright green, 

 growing in a crown, 2-4 ft. long, 3-9 in. wide, the mid- 

 rib rounded and usually green. Japan, East Indies. T. 

 atrfctum, Hort. [A^fJenendrium stricfum, Hort.), is a 

 more slender, npriglit form said to be a garden hybrid 

 between T. Nidus and Sclope^idriiftn crispum. 



T. Australisicum, Hook. Differs from the above in 

 its midri)), which is keeled on the back and often black. 

 Sometimes regarded as a variety. Australia. 



L. M. DSDEKWOOD. 



THASPIUM (name a play upon Thapsia, another 

 genus of the same family). i^mbellUera' , Meadow 

 Parsnip. A genus of 3 species of hardy perennial 

 herbs of eastern North America with ternately divided 

 leaves (or the lower undivided), and terminal nmbels 

 of yellow or purplish liowers. 



ataeum, Nutt. Stem branched, IK ft. high: root-lvs. 

 mostly cor<late; stem-lvs, ternate; Ifts. ovate to lan- 

 ceolate, serrate: fls. yellow. June, -July. Var. trifoli- 

 fLtum, Goult. & Rose, with crenate lvs. or Ifts., is a com- 

 mon western form. Var. atropurpfireum, Coult. & Rose, 

 fls. dark purple. The species is of easy culture in any 

 onlinary soil. In the wild state the plant grows in at 

 least partial shade. Well-grown plants, especially of 

 var. atropnrpureum, make attractive specimens. 



P. W. Bak.-lat. 



THEOBROMA 

 THfiA. See Ten and Camellia. 



THELESPfiKMA (Greek, learf, seed; the seeds are 

 often papillose). Viiiii pi'isila'. A genus of about 8 spe- 

 cies of annual or perennial herl)s, rarely shrubby at the 

 liase, native to the extra-tropical regions of North and 

 South America. They are smooth herbs with aspect of 

 t_'ureopsis, with mmdi cut leaves and long pedunculate 

 flower-heads, tyi)ically yellow rays and yellow, some- 

 times purplish or Ijrownish, disk-flowers. The genus 

 may be separated from Coreopsis by the form of the 

 involucre, which is in 2 series of bracts with the inner 

 series united to about the middle into a cup, while in 

 Coreopsis the 2 series are distinct and united only at 

 the very base. The seeds, especially the outer ones of 

 the head, iu Thele.sperma are often tuberculate. 



h^bridum, Voss {Cosmidiiim Bnrridrjectviim, Hort.). 

 Fig. 24'.>:"). A hardy annual, I'^i ft. high, a hybrid of T. 

 filifojimn and Coreopsis tivetoria, from the latter of 

 wliich it acquires the brown-pnrple color of its rays. 

 Lvs. bipinuately divided into filiform lobes not wider 

 than the stem. p, ■^. Barclay. 



2495. Thelesperma hybridum (flower X y^). 



THEOBROMA. Commercial Cacao or"Cocoa" ispro- 

 duced by trees belonging to the Linnasan genus Theo- 

 broma. The estates devoted to its culture are usually 

 known as "Cacao plantations" and are largely on the 

 increase in all suitable climates, owing to the increased 

 demand tor the manufactured article in the different 

 forms in which it is now prepared for consumptioD. 

 The larger proportion of conmiereial Cacao is producert 

 by Theohromn Cneao. Other species native to central 

 America and the West Indies are T. pevtagona, T. spe- 



