Difference between revisions of "Amelichloa"

Arriaga & Barkworth
Treatment appears in FNA Volume 24. Treatment on page 181.
FNA>Volume Importer
FNA>Volume Importer
Line 15: Line 15:
  
 
-->{{Treatment/Body
 
-->{{Treatment/Body
|discussion=<p>Amelichloa includes five species, four of which are South American. The fifth species, A. clandestina, grows in northern Mexico. Two species are established in the Flora region. A third species, A. caudata. was found on ballast dumps near Portland, Oregon, at the turn of the twentieth century; it is not established in the region.Cattle avoid species of Amelichloa because of their sharply pointed leaves. This means that any of the species could become a serious problem in rangelands. Mowing favors their establishment and spread because it does not eliminate, and may disperse, the cleistogenes. The species are eaten by goats.</p>
+
|discussion=<p><i>Amelichloa</i> includes five species, four of which are South American. The fifth species, <i>A. clandestina</i>, grows in northern Mexico. Two species are established in the Flora region. A third species, <i>A. caudata</i>. was found on ballast dumps near Portland, Oregon, at the turn of the twentieth century; it is not established in the region.Cattle avoid species of <i>Amelichloa</i> because of their sharply pointed leaves. This means that any of the species could become a serious problem in rangelands. Mowing favors their establishment and spread because it does not eliminate, and may disperse, the cleistogenes. The species are eaten by goats.</p>
 
|tables=
 
|tables=
 
|references={{Treatment/Reference
 
|references={{Treatment/Reference
Line 60: Line 60:
 
|family=Poaceae
 
|family=Poaceae
 
|illustrator=Cindy Roché
 
|illustrator=Cindy Roché
 +
|illustration copyright=Utah State University
 
|reference=caro1971a;torres1993b
 
|reference=caro1971a;torres1993b
 
|publication title=
 
|publication title=
 
|publication year=
 
|publication year=
 
|special status=
 
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/314eb390f968962f596ae85f506b4b3db8683b1b/coarse_grained_fna_xml/V24/V24_249.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V24/V24_249.xml
 
|subfamily=Poaceae subfam. Pooideae
 
|subfamily=Poaceae subfam. Pooideae
 
|tribe=Poaceae tribe Stipeae
 
|tribe=Poaceae tribe Stipeae

Revision as of 20:19, 16 December 2019

Plants perennial; cespitose. Culms erect, with 2-3 nodes, not branching at the upper nodes; basal branching intravaginal; prophylls concealed by the leaf sheaths, winged over the keels, apices bifid, teeth 0.5-3.5 mm. Leaves mostly basal; sheaths open, smooth, glabrous; cleistogenes often present, spikelets of cleistogenes 0.5-1 mm long, with thin glumes shorter than the florets, florets unawned or with reduced awns; auricles absent; ligules scarious, rounded to acute, ciliate; blades stiff, involute, apices stiff, brown, sharply pointed, blades of the flag leaves 5-13 cm long, bases similar in width to the top of the sheaths. Inflorescences panicles, the main panicle terminal, apparently wholly chasmogamous. Spikelets with 1 floret; disarticulation above the glumes, beneath the floret. Glumes exceeding the floret, acute to acuminate, 1-5-veined; florets fusiform, terete; calluses antrorsely strigose, blunt; lemmas pubescent, often more densely and/or more persistently so over the midvein and lateral veins, hairs on the proximal portion about 0.7-2 mm, hairs on the distal portion often longer; crowns not developed; awns once- or twice-geniculate, scabrous, persistent; paleas 3/4 as long as to almost equaling the lemmas, flat, hairy, hairs 0.2-1 mm, veins terminating at or near the apices, apices similar in texture to the body; lodicules 3; anthers 3, anthers sometimes all of equal size and more than 2 mm, sometimes 1 longer than 2 mm and 2 much shorter, sometimes all shorter than 2 mm; ovaries glabrous; styles with 2 branches, united at the base, stigmas plumose. Caryopses obovoid, with 3 smooth, longitudinal ribs at maturity, stylar bases 1-2 mm, persistent, sometimes eccentric; hila linear, about as long as the caryopses. x = unknown.

Discussion

Amelichloa includes five species, four of which are South American. The fifth species, A. clandestina, grows in northern Mexico. Two species are established in the Flora region. A third species, A. caudata. was found on ballast dumps near Portland, Oregon, at the turn of the twentieth century; it is not established in the region.Cattle avoid species of Amelichloa because of their sharply pointed leaves. This means that any of the species could become a serious problem in rangelands. Mowing favors their establishment and spread because it does not eliminate, and may disperse, the cleistogenes. The species are eaten by goats.

Key

1 Mature caryopses with inclined, eccentric stylar bases; lemmas glabrous or hairy between the lateral and marginal veins, glabrous between the midvein and the lateral vein, even at the base Amelichloa caudata
1 Mature caryopses with erect, usually centric stylar bases; proximal 1/2 of the lemmas pubescent between the lateral and marginal veins, at least initially, usually also between the midvein and lateral veins. > 2
2 Florets 4-5.5 mm long; ligules 0.2-0.6 mm long; anthers 2-3 mm long Amelichloa brachychaeta
2 Florets 5.5-8 mm long; ligules 0.5-1.5 mm long; anthers 3-4 mm long Amelichloa clandestina