Phlox 



POLEMONIACEAE-BORAGINACEAE 



Ehretia 



1. Phlox drummondii Hook. Annual Phlox Jg## (Fu Lu K'ao; Health, Wealth 

 and Happiness) (B.M.826). Erect annual, to 0.5 m.; fls. rose red. Introduced from 

 North America; locally in Ku. Cultivated, ornamental. Fig. 310. 



2. Phlox paniculata Linn. Summer Perennial Phlox l^frft (Ts'ao Chia Chu T'ao; 

 Herbaceous Oleander) (B.M. 827). Erect perennial, to lm.; fls. pink to purple. 

 Introduced from North America; locally in Ku. Cultivated, ornamental. 



149. BORAGINACEAE Borage Family WJKPt (Tzu Ts'ao K'o) 

 Herbs, shrubs or trees with mostly alternate estipulate simple entire rough-hairy 

 lvs. and perfect usually regular 5-merous fls. in scorpioid racemes, or in cymes; corolla 

 gamopetalous, often with appendages at the throat; stamens alternate with the lobes 

 of the corolla, inserted on its tube or throat; ovary superior, of two 2-ovuled carpels, 

 entire or, more often, deeply 4-lobed, with the style basal between the lobes: fr. usually 

 of A nutlets, sometimes berry-like. 100 genera with 2,000 species, widely distributed; 

 18 genera and over 50 species in China. 



Key to the Genera 



A. Plants woody, becoming trees: fr. a 1-4-seeded drupe 1. Ehretia 



A A. Plants herbaceous: fr. separating into 4 nutlets. 



B. Robust herb, 1.0-1 .5 m. high; fls. bright blue, 1.5-2. 0cm. across, 

 with conspicuous exserted saccate appendages in the throat: 

 nutlets with a plug-like attachment at the base surrounded 



by a ring-like collar 2. Airchnsa 



BB. Low, often slender herbs, up to 3 dm. high: fls. blue, white or 

 pink; appendages, when present, not conspicuously exserted: 

 base of nutlet not surrounded by a ring-like collar. 

 C. Nutlets ellipsoid or reniform, not sharply angled. 



Nutlets tuberculate, bearing an areole surrounded by a 

 double margin. 

 Nutlets divergent, with backs upturned; margins of areole 



conspicuous and well-developed 3. Thyrocarpus 



Nutlets vertical and parallel, with backs proximate; 



margins of areole low, rounded and inconspicuous.. 4. Bothriospermum 

 Nutlets smooth or verrucose, bony, not tuberculate, without 



areole 5 . lAthospermum 



CC. Nutlets sharply angled, about lmm. long; surface slightly 



granular 6 • Trigonotis 



1. Ehretia Linn. &W&U ( Hou K '° Shu Shu ^ 

 Deciduous or evergreen trees or shrubs with alternate entire or serrate simple lvs. 

 and small 5-merous usually whitens, in terminal (rarely axillary) panicles or corymbs; 

 stamens 5, usually exserted; ovary 2- or 4-celled: fr. a globose drupe with 4 one-celled 

 or two 2-celled nutlets. About 50 species in tropical and subtropical regions; 8 in 

 China. (After G.D. Ehret, botanical painter, born in Germany about 1710; died in 

 England 1770.) 



Key to the Species 



Fls, about 4 mm. long, very many, in long panicles; corolla 



lobes longer than the tube: lvs. glabrous 1. E. acuminata var. obovata 



Fls. 8-10 mm. long, in cymes; corolla lobes shorter than 



the tube : lvs. pubescent 2 . E. dicksom 



322 



